ORCID Profile
0000-0002-5452-5465
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Publisher: American Chemical Society (ACS)
Date: 02-05-2017
Publisher: Elsevier BV
Date: 2018
DOI: 10.1016/J.JCIS.2017.09.005
Abstract: Introducing a polarization electric field in photocatalyst system is regarded asa new concept for photocatalytic activity enhancement. In this work, we first unearth that the spontaneous polarization of ferroelectric BaTiO
Publisher: American Chemical Society (ACS)
Date: 06-05-2016
Publisher: American Chemical Society (ACS)
Date: 24-04-2009
DOI: 10.1021/JP9016344
Publisher: Royal Society of Chemistry (RSC)
Date: 2010
DOI: 10.1039/C0DT00194E
Abstract: In this article, mercapto-functionalized helical mesoporous silica nanorods have been synthesized by a one-step co-condensation of tetraethoxysilane (TEOS) and 3-mercaptopropyltrimethoxysilane (MPTS) using cetyltrimethylammonium bromide (CTAB) as a template. Process parameters, including MPTS concentration, stirring time and added volume of ethanol as co-solvent, were both carefully and accurately regulated, and obtained results showed that these parameters all had large effects on the morphology and structure of products. Furthermore, the helical mesoporous silica nanorods were successfully employed as multipurpose carriers for Au nanoparticles (NPs) and CdTe nanocrystals (NCs) by in situ formation and post-loading, respectively. In a preliminary catalytic test, Au NPs as small as ca. 0.6 nm in the helical mesoporous silica nanorods after calcination showed much enhanced catalytic activity for reduction of methylene blue (MB(+)).
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA07655B
Abstract: Non-centrosymmetric polar Bi 2 O 2 (OH)(NO 3 ) with a rational band structure and {001} active exposing facets is developed as a robust layered photocatalyst for photooxidative erse industrial contaminants and pharmaceuticals.
Publisher: Elsevier BV
Date: 10-2018
DOI: 10.1016/J.JCIS.2018.05.104
Abstract: Mesoporous organosilica materials with organo-bridged silsesquioxane and novel structures have attracted great attention due to combined or enhanced properties. Here, we achieved facile synthesis of uniform well-defined mesoporous organosilica nanobowls with ethane- or ethane&thioether-bridged silsesquioxane framework by one-pot reaction. The possible formation mechanism may be attributed to be a dynamic growth, dissolution and reassembly process, including a uniform coating of ethane-bridged organosilica on the surface of mesoporous silica nanoparticles (MSNs) or mesoporous organosilica nanoparticles (MONs), gradual dissolution of MSNs or MONs core for the collapse of hollow spheres, and regrowth and reassembly of a small portion of the dissolved species. The framework stability of MSNs can be regulated by adjusting the amount of introduction of thioether-bridged silsesquioxane in the framework from 0 to 100%, which determines the structures of finally obtained products (nanobowls or rough nanoparticle (NPs)). The interesting results shed light on fundamental mechanisms of growth and dissolution for design and synthesis of novel structured materials. The ethane&thioether-bridged nanobowls show good hemocompatibility and low cytotoxicity compared with ethane-bridged nanobowls and calcined MCM-41-typed MSNs. The unique nanobowl structure, worm-like mesochannels and silsesquioxane framework make it as potential candidates for nanobiomedical applications.
Publisher: Springer Science and Business Media LLC
Date: 29-06-2016
Publisher: Springer Science and Business Media LLC
Date: 09-05-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1NR11504A
Abstract: Our previously fabricated amino-functionalized silica nanoparticles (NPs) with center-radially hierarchical mesopores (NH(2)-HMSNs) were purified by a filtration membrane and used as catalyst carriers in the current article. Noble metal NPs (Au, Pd, Pt and Au & Pt) with small sizes (3-8 nm) were successfully immobilized into the NH(2)-HMSNs via the deposition-precipitation method. These noble metal NPs with readily adjusted small sizes have high density and well-dispersed distribution on the surface of large mesopores of NH(2)-HMSNs. Among them, Au-NH(2)-HMSNs were investigated as the composite catalyst in the catalytic reduction of 2-nitroaniline (2-NA) as a model reaction and exhibited excellent catalytic activity and stability. The presence of center-radially large mesopores in the NH(2)-HMSNs may favor the loading of noble metal NPs with high density and well-dispersed distribution on the surface of large mesopores of NH(2)-HMSNs. Metal-NH(2)-HMSNs may be more promising composite catalysts due to their superstructure of center-radially hierarchical mesopores that maybe significantly enhance and harmonize the diffusion of guest molecules of different sizes through the porous matrices.
Publisher: Elsevier BV
Date: 11-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7CY02362F
Abstract: Brønsted acid UiO-66 MOFs were prepared for the efficient homo-dimerization of 2 H -chromenes, which involves a tandem rearrangement/hetero-Diels–Alder reaction sequence.
Publisher: American Chemical Society (ACS)
Date: 18-02-2011
DOI: 10.1021/LA200014W
Abstract: Hierarchically mesoporous silica nanoparticles (HMSNs) with uniform morphology and structure and with a diameter of ca. 100-220 nm were facilely fabricated using water, ethanol and ethyl ether as cosolvents. Template extraction and amino-functionalization were performed toward the HMSNs. These hierarchical mesopores are supposed to possess more advantages than conventional monomodal mesopores. Amino-functionalized HMSNs were homogeneously grafted with fluorescent molecules and loaded with Au nanoparticles (NPs), respectively. The extracted HMSNs were also successfully used to construct antireflection and superhydrophilc coatings. Drug release experiments showed that HMSNs exhibit much quicker rates of drug release compared with conventional mesoporous NPs due to their hierarchically mesoporous structures.
Publisher: American Chemical Society (ACS)
Date: 25-09-2018
Publisher: Wiley
Date: 30-05-2011
Abstract: A series of hierarchically mesostructured silica nanoparticles (MSNs) less than 100 nm in size were fabricated by means of a one-step synthesis using dodecanethiol (C(12)-SH) and cetyltrimethylammonium bromide (CTAB) as the dual template, and trimethylbenzene (TMB) as the swelling agent. Silica nanoparticles with varied morphologies and structures, including mesoporous silica nanoparticles with tunable pore size, mesoporous silica nanoparticles with a thin solid shell, hollow mesoporous silica nanoparticles with tunable cavity size, and hollow mesoporous silica nanoparticles with a thin solid shell, were obtained by regulating the TMB/CTAB molar ratio and the stirring rate with the assistance of C(12)-SH. Silica particulate coatings were successfully fabricated by using MSNs with varied morphologies and structures as building block through layer-by-layer dip-coating on glass substrates. The thickness and roughness of the silica particulate coatings could be tailored by regulating the deposition cycles of nanoparticles. The silica particulate coatings composed of hollow mesoporous silica nanoparticles with a thin shell (S2) increased the maximum transmittance of slide glass from 90 to 96%, whereas they reduced its minimum reflection from 8 to 2% at the optimized wavelength region that could be adjusted from visible to near-IR with a growing number of deposition cycles. The coatings also exhibited excellent superhydrophilic and antifogging properties. These mesostructured silica nanoparticles are also expected to serve as ideal scaffolds for biological, medical, and catalytic applications.
Publisher: American Chemical Society (ACS)
Date: 03-11-2015
Publisher: Elsevier BV
Date: 05-2023
Publisher: Elsevier BV
Date: 11-2010
Publisher: Springer Science and Business Media LLC
Date: 06-09-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA04639A
Abstract: Precursor hydrothermal pre-treatment protocol was used to yield porous and thin g-C 3 N 4 nanosheets for enhanced photocatalytic H 2 evolution and NO removal.
Publisher: American Chemical Society (ACS)
Date: 29-03-2023
Publisher: Wiley
Date: 18-11-2022
Abstract: Facile and controllable synthesis of functional yolk@shell structured nanospheres with a tunable inner core (‘yolk') and mesoporous shell is highly desirable, yet it remains a great challenge. Herein, xx developed a strategy based on temperature‐regulated swelling and restricted asymmetric shrinkage of polydopamine (PDA) nanospheres, combined with heterogeneous interface self‐assembly growth. This method allows a simple and versatile preparation of PDA@mesoporous silica (MS) nanospheres exhibiting tunable yolk@shell architectures and shell pore sizes. Through reaction temperature‐regulated swelling degree and confined shrinkage of PDA nanospheres, the volume ratio of the hollow cavity that the PDA core occupies can easily be tuned from ca. 2/3 to ca. 1/2, then to ca. 2/5, finally to ca. 1/3. Owing to the presence of PDA with excellent photothermal conversion capacity, the PDA@MS nanocomposites with asymmetric yolk distributions can become a colloidal nanomotor propelled by near‐infrared (NIR) light. Noteworthily, the PDA@MS with half PDA yolk and microcracks in silica shell reaches 2.18 µm 2 s −1 of effective diffusion coefficient (De) in the presence of 1.0 W cm −2 NIR light. This temperature‐controlled swelling approach may provide new insight into the design and facile preparation of functional PDA‐based yolk@shell structured nanocomposites for wide applications in biology and medicine.
Publisher: Wiley
Date: 15-03-2017
Publisher: Elsevier BV
Date: 2018
Publisher: Wiley
Date: 06-07-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7NJ00264E
Abstract: A novel Zr-derived pyridine MOF ligand was designed and synthesized for an efficient Cu( i )-catalyzed secondary alcohol oxidation.
Publisher: Wiley
Date: 13-05-2012
Abstract: An efficient and facile one-pot method was developed to fabricate noble-metal nanoparticles (NMNs Au, Pt, PdO and Ag) that were encapsulated within hollow silica nanospheres (HSNs NMNs@HSNs) with a size of about 100 nm. NMNs@HSNs were afforded in very high yields between 85-95 %. Poly(acrylic acid) (PAA) polyelectrolyte played a dual role in the fabrication process, both as a core template of the HSNs and as a captor of the NMNs through coordination interactions between the COO(-) groups on the ammonium polyacrylate (APA) polyanionic chains and the empty orbital of the Au atom. The amount of Au loading in Au@HSNs was easily regulated by varying the volume of the HAuCl(4) solution added. In addition, these rattle-type particles were successfully applied in the catalytic reduction of 2-nitroaniline (2-NA) as a model reaction, thus indicating that the micropores in the silica shell could achieve the transport of small species--with a size smaller than that of the micropores--into the cavity. Thus, these fabricated NMNs@HSNs have promising applications in catalysis.
Publisher: Wiley
Date: 20-08-2013
Abstract: A novel nitrogen doped hybrid material composed of in situ-formed graphene natively grown on hierarchical ordered porous carbon is prepared, which successfully combines the advantages of both materials, such as high surface area, high mass transfer, and high conductivity. The outstanding structural properties of the resultant material render it an excellent metal-free catalyst for electrochemical oxygen reduction.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8AN00735G
Abstract: A quantified POCT device was designed based on wettability alteration in a capillary tube.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8TA09815H
Abstract: This review article provides a comprehensive overview of the dendritic fibrous nano-particle (DFNP) family including its origin, synthesis methods, structural characteristics and models, promising applications, and so forth.
Publisher: Elsevier BV
Date: 11-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C6RA04888A
Abstract: Sulfur doping simultaneously endows the wide-band-gap Bi 2 O 2 CO 3 promoted band energy structure and charge separation achieving enhanced visible-light photocatalytic performance for dye degradation and NO removal.
Publisher: No publisher found
Date: 2010
DOI: 10.1021/LA1016824
Abstract: Novel mesoporous silica nanoparticles of peculiar shapes were synthesized, from which hierarchically porous silica coatings were fabricated on glass substrates via layer-by-layer (LbL) assembly, followed by calcination. These porous silica coatings were highly transparent and superhydrophilic. The maximum transmittance reached as high as 94%, whereas that of the glass substrate is 91%. The time for a droplet to spread lower than 5 degrees decreased to as short as 0.25 s. After the coating surface was treated with a low surface energy material, the surface became superhydrophobic (water contract angle >150 degrees) with a very low sliding angle of <1 degree. Compared with MCM-41-type mesoporous silica nanoparticles, the coatings fabricated using the novel mesoporous silica nanoparticles possess much better self-cleaning property. We used scanning (SEM) and transmission (TEM) electron microscopy to observe the morphology and structure of nanoparticles and surfaces. Transmission spectra and their change with time were characterized by UV-vis spectrophotometer. We studied the surface wettability by a contact angle/interface system. The influence of mesopores on the transmittance and wetting properties of coatings was discussed on the basis of experimental observations.
Publisher: Elsevier BV
Date: 09-2012
DOI: 10.1016/J.JCIS.2012.05.037
Abstract: This article describes a simple method to fabricate uniform porous antireflective (AR) coatings composed of nanoflakes on the surface of soda lime glass through one-step hydrothermal alkali (NaOH) etching process. Experimental conditions including reaction temperature, NaOH concentration, and reaction time were investigated to find the optimal etching conditions, and the maximum transmittance increases from 90.5% to 98.5%. The coating thickness increases with increase in the NaOH concentration, leading to the tunable red-shift of transmission and reflection spectra in the UV and entire visible range. And the corresponding uniform structural reflected colors varying from gray, pale yellow, yellow, pink, blue to pale blue are observed when the etched glasses are viewed in reflected light. The relationship of coating thickness, transmittance, reflectance, and reflected color was obtained and discussed. The etched glass after introducing TiO(2) component onto the porous coating had AR, self-cleaning (superhydrophilic and photocatalytic) and antifogging properties. It is conceivable that such etched glasses would have broad potential applications in optical devices, solar cells, light emitting diodes, and varied window glasses.
Publisher: Elsevier BV
Date: 2017
Publisher: Wiley
Date: 03-11-2014
Abstract: Dendritic silica micro-/nanoparticles with center-radial pore structures, a kind of newly created porous material, have attracted considerable attention owing to their unique open three-dimensional dendritic superstructures with large pore channels and highly accessible internal surface areas compared with conventional mesoporous silica nanoparticles (MSNs). They are very promising platforms for a variety of applications in catalysis and nanomedicine. In this review, their unique structural characteristics and properties are first analyzed, then novel and interesting synthesis methods associated with the possible formation mechanisms are summarized to provide material scientists some inspiration for the preparation of this kind of dendritic particles. Subsequently, a few ex les of interesting applications are presented, mainly in catalysis, biomedicine, and other important fields such as for sacrificial templates and functional coatings. The review is concluded with an outlook on the prospects and challenges in terms of their controlled synthesis and potential applications.
Publisher: American Chemical Society (ACS)
Date: 15-07-2010
DOI: 10.1021/AM1003766
Abstract: Silica coatings with hierarchical structures were prepared on glass substrates via layer-by-layer assembly using hierarchically mesoporous silica nanoparticles as building block. These coatings demonstrated excellent superhydrophilic properties. After hydrophobic modification, the obtained coatings exhibited hydrophobic properties in the measurements of water contact angles by employing contact-mode and drip-mode, respectively. Water droplet of large volume (15 muL) had a smaller sliding angle than that of small volume (3 muL) when using the contact-mode due to the role of gravity despite the existence of large adhesive force between water droplet and the coating surface, while very small sliding angles were noted when using the drip-mode because of the existence of kinetic energy. The transmittance of fabricated coatings was enhanced and reduced, respectively, in the long and short wavelength ranges as compared with blank slide glass.
Publisher: American Chemical Society (ACS)
Date: 20-02-2019
Abstract: Asymmetric dual-function Janus micro-/nanoparticles (NPs) that have different surface modifications, structures, or material properties are extremely promising as building blocks in constructing micro-/nanomotors. However, current synthesis strategies make it usually difficult to precisely control the percentages of coverages of Janus micro-/NPs, which hinders in-depth research studies of their effects on the performance of Janus nanomotors. This study demonstrates a versatile approach for fabrication of Janus dendritic porous silica nanomotors with precisely modulated coverages from 0 to 100% by controlling the embedded depth of aminopropyl-modified dendritic porous silica NPs (DPSNs-NH
Publisher: Elsevier BV
Date: 07-2014
DOI: 10.1016/J.BIOMATERIALS.2014.03.051
Abstract: To create advanced functional nanocarriers for achieving excellent gene delivery performance, fluorescence label-free hybridized dendrimer-like silica nanocarriers (HPSNs-AC-PEI) were developed by using the endosomal pH and cytoplasmic glutathione (GSH) responsive autofluorescent acetaldehyde-modified-cystine (AC) to link non-toxic low molecular weight branched polyethyleneimine (PEI) onto amino-functionalized dendrimer-like silica nanoparticles with hierarchical pores (HPSNs-NH2). The specific microstructure of this hybridized nanocarrier makes it not only show low cytotoxicity and high gene loading capability, but also display high gene transfection efficiency. The cleavage of disulfide bonds caused by GSH facilitates plasmid DNA (pDNA) release. Moreover, the pH and GSH controlled gene delivery profile can be real-time tracked using the autofluorescence of HPSNs-AC-PEI.
Publisher: Elsevier BV
Date: 2018
Publisher: Wiley
Date: 02-10-2013
Abstract: A new strategy for promoting endoplasmic gene delivery and nucleus uptake is proposed by developing intracellular microenvironment responsive biocompatible polymers. This delivery system can efficiently load and self-assemble nucleic acids into nano-structured polyplexes at a neutral pH, release smaller imidazole-gene complexes from the polymer backbones at intracellular endosomal pH, transport nucleic acids into nucleus through intracellular environment responsive multiple-stage gene delivery, thus leading to a high cell transfection efficiency.
Publisher: Royal Society of Chemistry (RSC)
Date: 2011
DOI: 10.1039/C1NR10660K
Abstract: This paper reviews the progress made recently in synthesis and applications of spherical silica micro/nanomaterials with multilevel (hierarchical) structures. The spherical silica micro/nanomaterials with hierarchical structures are classified into four main structural categories that include (1) hollow mesoporous spheres, (2) core-in-(hollow porous shell) spheres, (3) hollow spheres with multiple porous shells and (4) hierarchically porous spheres. Due to the complex structures and being focused on spherical silica micro/nanomaterials, some novel methods based on the combination of two routine methods or two surfactants, and some special synthetic strategies are proposed to produce the spherical silica micro/nanomaterials with hierarchical structures. Compared with the same-sized solid, porous or hollow silica spheres, these fantastic spherical silica micro/nanomaterials with hierarchical structures exhibit enhanced properties which may enable them to be used in broad and promising applications as ideal scaffolds (carriers) for biological, medical, and catalytic applications.
Publisher: Elsevier BV
Date: 2020
Publisher: Elsevier BV
Date: 03-2020
DOI: 10.1016/J.JCIS.2019.12.049
Abstract: The mechanically robust nanocoatings with high transmittance and superhydrophobic self-cleaning are widely desired in daily-life and industry. However, to the state-of-art, it is still a great challenge to develop a simple and cost-effective approach to construct a multifunctional nanocoating due to structural confliction and technical limitation. In this work, we successfully fabricated such a multifunctional nanocoating through dip-coating a mixed suspension composed of acid-catalyzed silica sol (ACSS) as binder and hydrophobic silica nanoparticles (HSNs) as building block onto the glass substrate without any post-treatments. The introduction of ACSS highly crosslinked the HSNs and formed three-dimensional network structure, which enhanced the adhesion between HSNs and substrate, and thus significantly improved mechanical robustness of the nanocoatings. Moreover, it also retained enough porosity and surface roughness, thus achieving high transmittance and superhydrophobicity. The optimized nanocoating deposited on the glass slide had high transmittance of 96.17% and superhydrophobic self-cleaning property. It also showed highly mechanical robustness (3H pencil scratching test), enhanced adhesion (class of 4B for tape adhesion test), weatherable, and acidic (pH 5.0)/alkaline (pH 10.0) and thermal (250 °C) stability. The multifunctional nanocoating with the comprehensive performance has great potentials in practical applications.
Publisher: Elsevier BV
Date: 06-2016
DOI: 10.1016/J.BIOMATERIALS.2016.03.019
Abstract: Mesoporous silica material with organo-bridged silsesquioxane frameworks is a kind of synergistic combination of inorganic silica, mesopores and organics, resulting in some novel or enhanced physicochemical and biocompatible properties compared with conventional mesoporous silica materials with pure Si-O composition. With the rapid development of nanotechnology, monodispersed nanoscale periodic mesoporous organosilica nanoparticles (PMO NPs) and organo-bridged mesoporous silica nanoparticles (MSNs) with various organic groups and structures have recently been synthesized from 100%, or less, bridged organosilica precursors, respectively. Since then, these materials have been employed as carrier platforms to construct bioimaging and/or therapeutic agent delivery nanosystems for nano-biomedical application, and they demonstrate some unique and/or enhanced properties and performances. This review article provides a comprehensive overview of the controlled synthesis of PMO NPs and organo-bridged MSNs, physicochemical and biocompatible properties, and their nano-biomedical application as bioimaging agent and/or therapeutic agent delivery system.
Publisher: American Chemical Society (ACS)
Date: 16-12-2021
Publisher: Elsevier BV
Date: 06-2020
Publisher: Wiley
Date: 24-01-2008
Abstract: Raspberrylike organic/inorganic composite spheres are prepared by stepwise electrostatic assembly of polyelectrolytes and silica nanoparticles onto monodisperse polystyrene spheres. Hierarchically structured porous films of silica hollow spheres are fabricated from these composite spheres by layer-by-layer assembly with polyelectrolytes followed by calcination. The morphologies of the raspberrylike organic/inorganic composite spheres and the derived hierarchically structured porous films are observed by scanning and transmission electron microscopy. The surface properties of these films are investigated by measuring their water contact angles, water-spreading speed, and antifogging properties. The results show that such hierarchically structured porous films of silica hollow spheres have unique superhydrophilic and antifogging properties. Finally, the formation mechanism of these nanostructures and property-structure relationships are discussed in detail on the basis of experimental observations.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0SM00552E
Abstract: Janus nanomotors with H 2 O 2 and NIR light dual-propulsion were successfully constructed by employing dendritic porous silica nanoparticles as carriers via a Pickering emulsion and electrostatic self-assembly.
Publisher: Wiley
Date: 29-01-2008
DOI: 10.1002/APP.27774
Publisher: Wiley
Date: 02-09-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0SM01355B
Abstract: Lipase-modified dendritic silica/carbon@Pt nanomotors are designed with three engines for hybrid propulsions of H 2 O 2 , near-infrared light, and lipase.
Publisher: Elsevier BV
Date: 03-2016
DOI: 10.1016/J.ENZMICTEC.2015.12.008
Abstract: Functional nanomaterials have been pursued to assemble nanobiocatalysts since they can provide unique hierarchical nanostructures and localized nanoenvironments for enhancing enzyme specificity, stability and selectivity. Functionalized dendrimer-like hierarchically porous silica nanoparticles (HPSNs) was fabricated for assembling β-galactosidase nanobiocatalysts for bioconversion of lactose to galacto-oligosaccharides (GOS). The nanocarrier was functionalized with amino (NH2) and carboxyl (COOH) groups to facilitate enzyme binding, benchmarking with non-functionalized HPSNs. Successful conjugation of the functional groups was confirmed by FTIR, TGA and zeta potential analysis. HPSNs-NH2 showed 1.8-fold and 1.1-fold higher β-galactosidase adsorption than HPSNs-COOH and HPSNs carriers, respectively, with the highest enzyme adsorption capacity of 328mg/g nanocarrier at an initial enzyme concentration of 8mg/ml. The HPSNs-NH2 and β-galactosidase assembly (HPSNs-NH2-Gal) demonstrated to maintain the highest activity at all tested enzyme concentrations and exhibited activity up to 10 continuous cycles. Importantly, HPSNs-NH2-Gal was simply recycled through centrifugation, overcoming the challenging problems of separating the nanocarrier from the reaction medium. HPSNs-NH2-Gal had distinguished catalytic reaction profiles by favoring transgalactosylation, enhancing GOS production of up to 122g/l in comparison with 56g/l by free β-galactosidase. Furthermore, it generated up to 46g/l GOS at a lower initial lactose concentration while the free counterpart had negligible GOS production as hydrolysis was overwhelmingly dominant in the reaction system. Our research findings show the amino-functionalized HPSNs can selectively promote the enzyme activity of β-galactosidase for transgalactosylation, which is beneficial for GOS production.
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA01819K
Abstract: This review article provides a comprehensive overview of the nanostructure design of g-C 3 N 4 with various dimensional structures and promising applications.
Publisher: Wiley
Date: 19-08-2013
Abstract: Functionalized dendrimer-like hybrid silica nanoparticles with hierarchical pores are designed and synthesized. The unique structure, large surface area, and excellent biocompability render such materials attractive nanocarriers for the advanced delivery of various sized drugs and genes simultaneously.
Publisher: Elsevier BV
Date: 12-2021
Publisher: American Chemical Society (ACS)
Date: 20-07-2015
Publisher: Wiley
Date: 25-04-2018
Publisher: MDPI AG
Date: 30-06-2022
DOI: 10.3390/CHEMOSENSORS10070253
Abstract: Coinage metals, such as Cu, Ag and Au, can form nanoclusters, which, when functionalized with ligands, have unique electronic and optical properties and are widely used in biomedical imaging, remote sensing, labeling, catalytic, etc. The mechanisms, structures and properties of nanocluster assemblies have been well reviewed. However, the collections and analyses of nanocluster assemblies for sensor application are few. This review examines different nanocluster sensor platforms with a focus on the assembly and analysis of the assembly processes and ex les of applications.
Publisher: Elsevier BV
Date: 08-2020
Publisher: Elsevier BV
Date: 09-2023
Publisher: American Chemical Society (ACS)
Date: 16-03-2010
DOI: 10.1021/LA100196J
Abstract: Silica nanospheres with varied morphologies and pore structures, including mesoporous nanospheres, nanospheres with hierarchical pores (from 2 to 100 nm), and hollow nanospheres of mesoporous shell, were fabricated at room temperature simply by regulating the ethanol/ethyl ether volume ratio in the starting solution. The silica nanostructures were characterized by small-angle X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and nitrogen adsorption-desorption measurements. Based on experimental results, a plausible mechanism for the structural regulation of mesoporous silicas has been put forward. These novel nanostructures of hierarchical pores provide an ideal scaffold for biological, medical, and catalytic applications.
Publisher: Elsevier BV
Date: 08-2017
Publisher: American Chemical Society (ACS)
Date: 31-07-2017
Publisher: Springer Science and Business Media LLC
Date: 08-2011
Publisher: Wiley
Date: 06-10-2014
Publisher: Elsevier BV
Date: 04-2017
Publisher: American Chemical Society (ACS)
Date: 10-05-2022
Abstract: The slippery liquid-infused surfaces show a great antibacterial property. However, most liquid-infused surfaces cannot detect whether or not the unknown aqueous s les contain microorganisms. Therefore, it is highly necessary but a challenge to integrate bacterial sensing capability into antibacterial surface. In this work, we prepared a slippery patterned liquid-infused nanocoating on the glass substrate for integrating bacterial sensing capability into the bacterial repellence surface. Dendritic mesoporous silica nanoparticles (DMSNs) with a suitable particle size of ca. 128 nm were employed as a building block to fabricate the multifunctional nanocoating with a superhydrophilic microwell and hydrophobic periphery by a dip-coating strategy, hydrophobic treatment, photomask-mediated plasma etching, and liquid infusion. Dendritic porous silica nanoparticles (DPSNs) with a larger particle size of ca. 260 nm were uniformly loaded with Au nanoparticles (NPs), providing large surface area for the modification of Raman reporter (4-mercaptobenzoic acid (4-MBA)) and aptamer. Thus, as a Raman tag, the formed DPSNs-Au-MBA-aptamer could achieve sensitive surface-enhanced Raman spectroscopy (SERS) detection of target bacteria. Combined with the Raman tag, the patterned liquid-infused nanocoating not only completely repelled bacteria on the hydrophobic area but also enabled sensitive SERS detection of
Publisher: Elsevier BV
Date: 10-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4TB01601G
Abstract: Tunable stellate mesoporous silica nanoparticles are functionalized with low molecular poly(ethylene imine) for efficient label-free intracellular drug delivery.
Publisher: Elsevier BV
Date: 11-2016
Publisher: Wiley
Date: 12-01-2015
Abstract: Poor cellular uptake of drug delivery carriers and uncontrolled drug release remain to be the major obstacles in cancer therapy due to their low delivery efficiency. In this study, a multifunctional intracellular GSH (glutathione)-responsive silica-based drug delivery system with enhanced cellular uptake capability is developed. Uniform 50 nm colloidal mesoporous silica nanoparticles (MSNs) with mercaptopropyl-functionalized core and silanol-contained silica surface (MSNs-SHin ) are designed and fabricated as a platform for drug covalent attachment and particle surface modification. Doxorubicin (DOX) with primary amine group as an anticancer model drug is covalently conjugated to the mesopores of MSNs-SHin via disulfide bonds in the presence of a heterobifunctional linker (N-Succinimidyl 3-(2-pyridyldithio) propionate). Poly(γ-glutamic acid) (γ-PGA) can be coated onto the particle surface by sequential electrostatic adsorption of polyethyleneimine (PEI) and γ-PGA. The constructed delivery system exhibits enhanced cellular uptake via a speculated γ-glutamyl transpeptidase (GGT)-mediated endocytosis pathway and controlled drug release capacity via intracellular GSH-responsive disulfide-bond cleavage, and thus significantly inhibits the growth of cancer cells. The multifunctional delivery system paves a new way for developing high-efficient particle-based nanotherapeutic approach for cancer treatment.
Publisher: Royal Society of Chemistry (RSC)
Date: 2016
DOI: 10.1039/C5RA22885A
Abstract: Novel dendritic porous particles were employed to fabricate broadband antireflective superhydrophobic self-cleaning coatings by facile dip-coating method.
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D1TB00984B
Abstract: A novel composite of low molecular weight PEI combined with g -C 3 N 4 was investigated as an siRNA delivery system with dual fluorescence and Raman traceable abilities.
Publisher: Elsevier BV
Date: 06-2009
Publisher: Elsevier BV
Date: 03-2017
Publisher: Wiley
Date: 29-03-2017
Abstract: Controlled-release systems based on mesoporous silica nanomaterials (MSNs) have drawn great attention owing to their potential biomedical applications. Various switches have been designed to control the release of cargoes through the construction of physical blocking units on the surface of MSNs. However, such physical blockages are limited by poor sealing ability and low biocompatibility, and most of them lack closure ability. Herein, a voltage-responsive controlled-release system was constructed by functionalizing the nanopore of MSNs with ferrocene. The system realized free-blockage controlled release and achieved pulsatile release. The nanopores of the ferrocene-functionalized MSNs were hydrophobic enough to prevent invasion of the solution. Once a suitable voltage was applied, the nanopores became hydrophilic, which was followed by invasion of the solution and the release of the cargos. Moreover, pulsatile release was realized, which avoided unexpected release after the stimulus disappeared. Thus, we believe that our studies provide new insight into highly effective blockage for MSNs. Furthermore, the voltage-responsive release system is expected to find use in electrical stimulation combination therapy and bioelectricity-responsive release.
Publisher: MDPI AG
Date: 11-07-2022
DOI: 10.3390/BIOS12070511
Abstract: The findings from the synthetic mechanism of metal nanoclusters yield the etching chemistry based on coinage metal nanoclusters. The utilization of such chemistry as a tool that can alter the optical properties of metal nanoclusters has inspired the development of a series of emerging luminescent biosensors. Compared with other sensors, the luminescent biosensors have the advantages of being more sensitive, saving time and saving cost. We reviewed topics on the luminescent sensors based on the etching of emissive coinage metal nanoclusters. The molecules possessing varied etching ability towards metal nanoclusters were categorized with discussions of corresponding etching mechanisms. The understanding of etching mechanisms favored the discussions of how to use etching methods to detecting biochemical molecules. The emerging luminescent biosensors via etching chemistry also provided challenges and new opportunities for analytical chemistry and sensors.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5NR00640F
Abstract: Dendrimer-like silica particles with a center-radial dendritic framework and a synergistic hierarchical porosity have attracted much attention due to their unique open three-dimensional superstructures with high accessibility to the internal surface areas however, the delicate regulation of the hierarchical porosity has been difficult to achieve up to now. Herein, a series of dendrimer-like amino-functionalized silica particles with tunable hierarchical pores (HPSNs-NH2) were successfully fabricated by carefully regulating and optimizing the various experimental parameters in the ethyl ether emulsion systems via a one-pot sol-gel reaction. Interestingly, the simple adjustment of the stirring rate or reaction temperature was found to be an easy and effective route to achieve the controllable regulation towards center-radial large pore sizes from ca. 37-267 (148 ± 45) nm to ca. 8-119 (36 ± 21) nm for HPSNs-NH2 with particle sizes of 300-700 nm and from ca. 9-157 (52 ± 28) nm to ca. 8-105 (30 ± 16) nm for HPSNs-NH2 with particle sizes of 100-320 nm. To the best of our knowledge, this is the first successful regulation towards center-radial large pore sizes in such large ranges. The formation of HPSNs-NH2 may be attributed to the complex cross-coupling of two processes: the dynamic diffusion of ethyl ether molecules and the self-assembly of partially hydrolyzed TEOS species and CTAB molecules at the dynamic ethyl ether-water interface of uniform small quasi-emulsion droplets. Thus, these results regarding the elaborate regulation of center-radial large pores and particle sizes not only help us better understand the complicated self-assembly at the dynamic oil-water interface, but also provide a unique and ideal platform as carriers or supports for adsorption, separation, catalysis, biomedicine, and sensor.
Publisher: Elsevier BV
Date: 04-2023
Publisher: Elsevier BV
Date: 04-2019
Publisher: Elsevier BV
Date: 2021
Publisher: Elsevier BV
Date: 12-2016
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0NJ02672G
Abstract: DPSNs@Cu-BTC was achieved using dendrimer-like porous silica nanoparticles as a support and as an efficient catalyst for olefin epoxidation.
Publisher: Elsevier BV
Date: 06-2023
Publisher: Elsevier BV
Date: 11-2017
Publisher: CSIRO Publishing
Date: 2009
DOI: 10.1071/CH09359
Abstract: As determined by X-ray crystallography, isoxazol-5(4H)-one derivatives 12–19 feature dihedral angles around the exocyclic C4=C6 double bonds of 26–90°. In the most highly twisted bis-tert-butylamino derivatives 18 and 19, the C4–C6 bonds are essentially single bonds. Density functional theory calculations at the B3LYP/6-31G(d) level with inclusion of a simulated solvent field, which helps stabilize zwitterionic structures, are in good agreement with the experimental crystallographic data. A good correlation between bond lengths and calculated π/π* orbital occupation quotients is observed. A good correlation between the twisting angle and the charge separation, measured by the calculated negative charge on the isoxazolone moiety, is also observed. Low barriers to rotation about the twisted exocyclic double bonds C4=C6 in compounds 13, 20, and 21 (ΔG ‡ = 15–16 kcal mol–1 (63–67 kJ mol–1)) were determined by dynamic 1H NMR coalescence measurements. The rotational barrier for 17 was estimated to be less than 10 kcal mol–1. The rotational barriers for compounds 10 and 18 were calculated to be ~8 kcal mol–1.
Publisher: American Chemical Society (ACS)
Date: 16-07-2009
DOI: 10.1021/JP9056175
Publisher: Elsevier BV
Date: 10-2016
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 08-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6TB03368G
Abstract: Redox-triggered biodegradable hybrid nanocapsules with the disulfide-bridged silsesquioxane framework were developed for promising drug delivery.
Publisher: Elsevier BV
Date: 06-2021
Publisher: Elsevier BV
Date: 04-2017
Publisher: Wiley
Date: 04-05-2017
Publisher: Elsevier BV
Date: 07-2023
Publisher: Elsevier BV
Date: 12-2016
Publisher: Elsevier BV
Date: 11-2015
DOI: 10.1016/J.JCIS.2015.07.040
Abstract: The surface free energy and geometrical structure are two important factors to govern the surface wettability. However, the design and simple synthesis of materials with specific surface free energy and geometrical structure, and their elaborate regulations are still a key challenge. Herein, through one-step thermal evaporation method, we successfully synthesized aligned arrays of highly crystallized ZnO with modulated nail structures on the stainless steel meshes for the first time. Owing to the decoration of [0001] oriented nail structures, the wire surface of meshes were indeed enclosed by the ZnO (0002) facets, which had the lowest surface energy in wurtzite structure. Under no any further modifications, just by regulating the nail structure and density as well as the mesh pore sizes, we not only obtained ZnO nail-coated mesh with hydrophobic, oleophilic (oil penetration), and underwater oleophilic properties, but also fabricated one with hydrophilic (water penetration), oleophilic (oil penetration), and underwater superoleophobic properties. Furthermore, interestingly, the separation of oil and water mixture was realized by utilizing two ZnO-nail coated meshes with different wettability. The underlying mechanism was investigated and discussed in the work. Therefore, our study provides interesting insight into the design of novel functional films with desired surface wettability for the separation of oil-water mixture.
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5TA03669K
Abstract: CeO 2 /g-C 3 N 4 n–n type heterojunction was successfully constructed via a facile in situ co-pyrolysis route by employing Ce(IO 3 ) 3 and melamine as precursors. It exhibits high photo-induced oxidation and reduction properties for degradation of phenol, NO removal and hydrogen evolution.
Publisher: Wiley
Date: 04-05-2017
Publisher: American Chemical Society (ACS)
Date: 17-03-2011
DOI: 10.1021/AM200079W
Abstract: A simple, mild, and effective self-templated etching strategy has been developed to directly convert SiO(2) nanospheres into surface-rough SiO(2) (SR-SiO(2)) nanoparticles (NPs) by reaction with NaBH(4). Small SiO(2) NPs on the surface of SR-SiO(2) NPs can be tailored by carefully regulating the reaction time. SiO(2) nanospheres with varied sizes were etched under varied reaction conditions. Subsequently, particulate coatings were constructed on slide glass using SR-SiO(2) NPs as building blocks through the Layer-by-Layer assembly. Slide glasses just coated with two cycles of SR-SiO(2) NPs followed by calcination and hydrophobic modification exhibited superhydrophobicity because of their dual-size surface roughness.
Publisher: Elsevier BV
Date: 12-2019
Publisher: Wiley
Date: 10-2015
Abstract: Mesoporous silica nanoparticles are modified with dual targeting ligands, i.e., folic acid and dexamethasone, to construct a cancer-cell-specific nuclear-targeted delivery system. The resulting nanocarriers can not only enhance the inhibition efficacy of doxorubicin on Hela cells through active nucleus accumulation but also reduce toxic side effects on noncancer cells though receptor-mediated selective cellular uptake.
Publisher: Elsevier BV
Date: 05-2010
DOI: 10.1016/J.JCIS.2010.02.012
Abstract: In this work, in situ encapsulation of ibuprofen (IBU) was explored preliminarily using the emulsion sol-gel method. IBU-containing porous silica nanospheres (300-400 nm) of varied morphologies were fabricated simply by tailoring the amount of IBU in the starting solution. In the reaction system, IBU exists in the form of IBU(-) under basic conditions, which has strong electrostatic interaction with CTA(+), and thus could be regarded as cosurfactant to regulate the morphology and structure of silica nanospheres. Such morphology can be maintained even after calcination or IBU release in phosphate-buffered saline. The current results may shed light on the design and construction of new functional nanoarchitectures, which may be useful for drug delivery, separation, adsorption, catalysis, etc.
Publisher: Wiley
Date: 15-11-2016
Abstract: Design and synthesis of porous and hollow carbon spheres have attracted considerable interest in the past decade due to their superior physicochemical properties and widespread applications. However, it is still a big challenge to achieve controllable synthesis of hollow carbon nanospheres with center-radial large mesopores in the shells and inner surface roughness. Herein, porous hollow carbon nanospheres (PHCNs) are successfully synthesized with tunable center-radial mesopore channels in the shells and crater-like inner surfaces by employing dendrimer-like mesoporous silica nanospheres (DMSNs) as hard templates. Compared with conventional mesoporous nanospheres, DMSN templates not only result in the formation of center-radial large mesopores in the shells, but also produce a crater-like inner surface. PHCNs can be tuned from open center-radial mesoporous shells to relatively closed microporous shells. After functionalization with polyethyleneimine (PEI) and poly(ethylene glycol) (PEG), PHCNs not only have negligible cytotoxicity, excellent photothermal property, and high coloading capacity of 482 µg of doxorubicin and 44 µg of siRNA per mg, but can also efficiently deliver these substances into cells, thus displaying enhanced cancer cell killing capacity by triple-combination therapy.
Publisher: Elsevier BV
Date: 12-2017
DOI: 10.1016/J.JCIS.2017.08.042
Abstract: A central issue in understanding photo-redox catalysis is the facet-dependent charge movement behaviors that include bulk charge separation, surface charge transfer and interfacial charge migration. To get in-depth insight into these complicated processes steered by different exposing facets, herein BiOCl with exposed (001) and (010) facets engaged as the model are investigated. The BiOCl-(010) and BiOCl-(001) single-crystalline sheets are separately synthesized via hydrothermal and hydrolysis routes. In contrast to BiOCl-(010), BiOCl-(001) demonstrates highly promoted photo-redox performance for H
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7TA07271F
Abstract: The integrated dendritic porous yolk@ordered mesoporous shell structured heterogeneous nanocatalysts exhibit enhanced stability and superior catalytic performance.
Publisher: Elsevier BV
Date: 10-2019
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8NJ01354C
Abstract: An efficient homo-dimerization of 2 H -chromenes was achieved in high yield and diastereoselectivity using a MIL-101–SO 3 H MOF catalyst.
Publisher: Wiley
Date: 31-03-2017
Abstract: Innovative nanoparticles hold promising potential for disease therapy as drug delivery systems. For brain-disease therapy, a drug delivery system that can sustainably control drug-release and monitor fluorescence of the drug cargos is highly desirable. In this study, a light-traceable and intracellular microenvironment-responsive drug delivery system was developed based on the combination of glutathione-responsive autoflurescent nanogel, dendrimer-like mesoporous silica nanoparticles, and gold nanoparticles. The resulting hybrid nanoparticles represent a new class of delivery system that can efficiently load, transport, and control multistage-release of sulfydryl-containing drugs into neurons, with light-traceable monitoring for future brain-disease therapy.
Publisher: Elsevier BV
Date: 10-2020
No related grants have been discovered for Xin Du.