ORCID Profile
0000-0001-7722-393X
Current Organisation
Zhejiang University
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Publisher: Elsevier BV
Date: 06-2022
Publisher: American Chemical Society (ACS)
Date: 06-05-2022
Publisher: Springer Science and Business Media LLC
Date: 10-07-2023
DOI: 10.1038/S41467-023-39533-Y
Abstract: Covalent modification is commonly used to tune the channel size and functionality of 2D membranes. However, common synthesis strategies used to produce such modifications are known to disrupt the structure of the membranes. Herein, we report less intrusive yet equally effective non-covalent modifications on Ti 3 C 2 T x MXene membranes by a solvent treatment, where the channels are robustly decorated by protic solvents via hydrogen bond network. The densely functionalized (-O, -F, -OH) Ti 3 C 2 T x channel allows multiple hydrogen bond establishment and its sub-1-nm size induces a nanoconfinement effect to greatly strengthen these interactions by maintaining solvent-MXene distance and solvent orientation. In sub-1-nm ion sieving and separation, as-decorated membranes exhibit stable ion rejection, and proton-cation (H + /M n+ ) selectivity that is up to 50 times and 30 times, respectively, higher than that of pristine membranes. It demonstrates the feasibility of non-covalent methods as a broad modification alternative for nanochannels integrated in energy-, resource- and environment-related applications.
Publisher: American Chemical Society (ACS)
Date: 17-09-2019
Abstract: Voltage-gated nanofluidic systems have shown a wide range of potential applications in biosensors, energy harvest, and separation. Two-dimensional (2D) nanofluidic membranes fabricated with electrically conductive nanosheets have high ion conductivity and voltage-gated ion transport behaviors. However, the voltage-gating effect of the sub-nanometer-sized 2D channel membranes has not been well-investigated. In this work, a high-performance voltage-gated 2D nanofluidic device is constructed by assembling MXene nanosheets into a laminar membrane with sub-1 nm interlayer channels. By applying external voltage to the membrane, the ion conductivity of the device is enhanced by positive voltages and reduced by negative voltages, exhibiting a high voltage-gating on-off ratio of ∼10. The on-off ratio is found to be dependent on ion concentration and ion species. This work demonstrates that 2D membranes with interlayer spacings comparable to those of hydrated ion diameters can achieve high and tunable voltage-gating function, which provides a strategy to construct devices for highly efficient on-demand ion transport.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3TA03622G
Abstract: A ferrocene based polymer (Fc-POP) is designed for solar-driven CO 2 cycloaddition from flue gas, resulting in high CO 2 -philic (adsorption capacity, 5.38 wt%, 0.15 bar) and outstanding styrene carbonate productivity (93%, 15 vol% CO 2 ).
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2TA02026B
Abstract: The water uptake capacity of M-8010 supraparticles is enhanced under low humidity, benefiting from the synergistic effect between the preconcentration functions of shell MOF-801 and the high storage capacity of core MIL-101.
Publisher: Elsevier BV
Date: 08-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3NR03464J
Publisher: Elsevier BV
Date: 10-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2TA08244F
Abstract: Ionic conductivity improvement is achieved in “water-in-salt” electrolytes by confinement in 2D membrane-based nanochannels due to functional group-induced stratification. This benefits the higher performance of aqueous batteries.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA02256A
Abstract: A 2D scaffold of graphene oxide is formed inside a polymer to assist the fabrication of a defect-free and ultrathin ( nm) selective layer of thermally rearranged polybenzoxazole- co -imide membrane for energy-efficient CO 2 separation.
Publisher: Elsevier BV
Date: 06-2023
Publisher: Elsevier BV
Date: 12-2022
Publisher: Wiley
Date: 19-02-2022
Abstract: Amid the burgeoning environmental concerns, electrochemical energy storage is of great demand, inspiring the rapid development of electrolytes. Quasi‐liquid solid electrolytes (QLSEs) demonstrate exciting properties that combine high ionic conductivity and safety. Herein, a QLSE system is constructed by confining ionic liquids (ILs) into 2D materials‐based membranes, which creates a subtle platform for the investigation of the nanoconfined ion transport process. The highest ionic conductivity increment of 506% can be observed when ILs are under nanoconfinement. Correlation of experimental results and simulation evidently prove the diffusion behaviors of ILs are remarkably accelerated when confined in nanochannels, ascribing from the promoted dissociation of ILs. Concurrently, nanoconfined ILs demonstrate a highly ordered distribution, lower interplay, and higher free volume compared against bulk systems. This work reveals and analyzes the phenomenon of ionic conductivity elevation in nanoconfined ILs, and offers inspiring opportunities to fabricate the highly stable and efficient QLSEs based on layered nanomaterials for energy storage applications.
Publisher: Wiley
Date: 11-11-2018
Publisher: American Chemical Society (ACS)
Date: 29-05-2018
Abstract: Carbon molecular sieve (CMS) membranes have shown great potential for gas separation owing to their low cost, good chemical stability, and high selectivity. However, most of the conventional CMS membranes exhibit low gas permeance due to their thick active layer, which limits their practical applications. Herein, we report a new strategy for fabricating CMS membranes with a 100 nm-thick ultrathin active layer using poly(furfuryl alcohol) (PFA) as a carbon precursor and carbon nanotubes (CNTs) as nanoscaffolds. CNT networks are deposited on a porous substrate as nanoscaffolds, which guide PFA solution to effectively spread over the substrate and form a continuous layer, minimizing the penetration of PFA into the pores of the substrate. After pyrolysis process, the CMS membranes with 100-1000 nm-thick active layer can be obtained by adjusting the CNT loading. The 322 nm-thick CMS membrane exhibits the best trade-off between the gas permeance and selectivity, a H
No related grants have been discovered for Yuqi Wang.