ORCID Profile
0000-0002-0294-7738
Current Organisation
University of Sydney
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Chemical Engineering | Membrane and Separation Technologies | Ceramics | Manufacturing Processes and Technologies (excl. Textiles) | Carbon Capture Engineering (excl. Sequestration) |
Expanding Knowledge in Engineering | Industrial Gases | Ceramics
Publisher: Elsevier BV
Date: 2021
Publisher: Elsevier BV
Date: 10-2014
Publisher: MDPI AG
Date: 12-07-2013
Publisher: Elsevier BV
Date: 05-2018
Publisher: Elsevier BV
Date: 03-2017
Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 11-2015
Publisher: Elsevier BV
Date: 2014
Publisher: Elsevier BV
Date: 12-2020
Publisher: Elsevier BV
Date: 06-2013
Publisher: MDPI AG
Date: 03-09-2012
DOI: 10.3390/W4030629
Publisher: Elsevier BV
Date: 03-2020
Publisher: Elsevier BV
Date: 03-2020
Publisher: American Chemical Society (ACS)
Date: 24-01-2014
DOI: 10.1021/BM401728P
Abstract: A novel water-soluble macromonomer based on octavinyl silsesquioxane has been synthesized and contains vinyl-terminated PEG 400 in each of the eight arms to promote water solubility. The macromonomer was characterized by NMR and FTIR and its aqueous solution properties examined. In water it exhibits an LCST with a cloud point at 23 °C for a 10 wt % aqueous solution. It is surface active with a CMC of 1.5 × 10(-5) M in water and in 20:80 v/v acetone/water the CMC is 7.1 × 10(-5) M, and TEM images showed spherical 22 nm aggregates in aqueous solution above the CMC. The macromonomer was copolymerized in a 20:80 v/v acetone/water mixture with a vinyl-terminated, triblock copolymer of lactide-PEG-lactide to form a library of cross-linked hydrogels that were designed for use as scaffolds for alveolar bone repair. The cross-linked copolymer networks were shown to contain a range of nm-μm sized pores and their swelling properties in water and PBS at pH 7.4 were examined. At pH 7.4 the hydrogel networks undergo a slow hydrolysis with the release of principally PEG and lactic acid fragments. The hydrogels were shown to be noncytotoxic toward fibroblast cultures at pH 7.4, both initially (days 1-5) and after significant hydrolysis had taken place (days 23-28).
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1SM06584J
Publisher: Springer Science and Business Media LLC
Date: 22-12-2018
Publisher: Elsevier
Date: 2017
Publisher: Elsevier BV
Date: 02-2017
DOI: 10.1016/J.CARBPOL.2016.12.002
Abstract: A fitting method combined with a linear correlation function was developed as an improved approach for the SAXS analysis of the semicrystalline lamellae of starch granules. Using a power-law function with two Gaussian plus Lorentz functions, the SAXS pattern was resolved into sub-patterns of the net lamellar peak and the power-law scattering plus scattering background (PL+B). The ratio of the net lamellar peak area (A
Publisher: Springer Science and Business Media LLC
Date: 28-09-2015
DOI: 10.1038/SREP14560
Abstract: A ternary phase-separation investigation of the ethyl silicate 40 (ES40) sol-gel process was conducted using ethanol and water as the solvent and hydrolysing agent, respectively. This oligomeric silica precursor underwent various degrees of phase separation behaviour in solution during the sol-gel reactions as a function of temperature and H 2 O/Si ratios. The solution composition within the immiscible region of the ES40 phase-separated system shows that the hydrolysis and condensation reactions decreased with decreasing reaction temperature. A mesoporous structure was obtained at low temperature due to weak drying forces from slow solvent evaporation on one hand and formation of unreacted ES40 cages in the other, which reduced network shrinkage and produced larger pores. This was attributed to the concentration of the reactive sites around the phase-separated interface, which enhanced the condensation and crosslinking. Contrary to dense silica structures obtained from sol-gel reactions in the miscible region, higher microporosity was produced via a phase-separated sol-gel system by using high H 2 O/Si ratios. This tailoring process facilitated further condensation reactions and crosslinking of silica chains, which coupled with stiffening of the network, made it more resistant to compression and densification.
Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier
Date: 2019
Publisher: Wiley
Date: 10-2010
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 06-2015
Publisher: Elsevier BV
Date: 04-2021
Publisher: Elsevier BV
Date: 02-2015
Publisher: Royal Society of Chemistry (RSC)
Date: 2022
DOI: 10.1039/D2EN00206J
Abstract: The structure–reactivity relationship of g-C 3 N 4 embedded with 0–2D carbon-based nanomaterials towards photocatalysis of emerging contaminants is presented.
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 09-2016
Publisher: Elsevier
Date: 2017
Publisher: Elsevier BV
Date: 11-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C5CP02309B
Abstract: Cobalt oxide clusters of long range order greatly improved the stability of microporous silica under harsh hydrothermal conditions.
Publisher: Elsevier BV
Date: 2017
Publisher: Elsevier BV
Date: 03-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C2JM00039C
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 12-2018
Publisher: Wiley
Date: 22-10-2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4RA00498A
Abstract: High cobalt oxide concentrations were able to shield the microporous silica network from excessive structural rearrangement during harsh hydrothermal testing.
Publisher: Elsevier BV
Date: 2011
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8EW00584B
Abstract: Free nitrous acid (FNA) shows strong potential as an effective cleaning reagent in fouling control in a forward osmosis filtration system, with a relatively longer time required.
Publisher: Elsevier BV
Date: 10-2017
DOI: 10.1016/J.IJBIOMAC.2017.05.008
Abstract: With synchrotron small/wide-angle X-ray scattering (SAXS/WAXS), we revealed that post-harvest hydration at ambient conditions can further alter the starch crystalline structure. The hydration process induced the alignment of starch helices into crystalline lamellae, irrespective of the starch type (A- or B-). In this process, non-crystalline helices were probably packed with water molecules to form new crystal units, thereby enhancing the overall concentration of starch crystallinity. In particular, a fraction of the monoclinic crystal units of the A-type starches encapsulated water molecules during hydration, leading to the outward movement of starch helices. Such movement resulted in the transformation of monoclinic units into hexagonal units, which was associated with the B-type crystallites. Hence, the hydration under ambient conditions could enhance the B-polymorphic features for both A-type and B-type starches. The new knowledge obtained here may guide the design of biopolymer-based liquid crystal materials with controlled lattice regularity and demanded features.
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/C9EW00608G
Abstract: This study systematically explores the potential applications of forward osmosis (FO) membrane based technology in urban wastewater treatment and water reclamation for their techno-economic feasibility and sustainability.
Publisher: Elsevier BV
Date: 2022
Publisher: American Chemical Society (ACS)
Date: 11-11-2020
Publisher: American Chemical Society (ACS)
Date: 13-12-2019
Publisher: Springer Science and Business Media LLC
Date: 22-01-2015
DOI: 10.1038/SREP07970
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0EN00329H
Abstract: GO rapidly photocatalyzes the reduction of Cr( vi ) utilizing sunlight in the presence of oxalate that acts as an electron donor and chelating agent.
Publisher: Elsevier BV
Date: 04-2014
Publisher: Elsevier BV
Date: 02-2011
Publisher: Elsevier BV
Date: 10-2013
Publisher: Wiley
Date: 21-12-2012
DOI: 10.1002/POLA.25874
Publisher: Elsevier BV
Date: 12-2020
Publisher: Springer Science and Business Media LLC
Date: 10-04-2013
DOI: 10.1038/SREP01648
Publisher: Elsevier BV
Date: 2021
Publisher: American Chemical Society (ACS)
Date: 19-05-2017
Publisher: Elsevier BV
Date: 11-2016
Publisher: Elsevier BV
Date: 02-2017
Publisher: Elsevier BV
Date: 10-2015
Publisher: Elsevier BV
Date: 04-2020
Publisher: Elsevier BV
Date: 02-2017
Publisher: Elsevier BV
Date: 09-2019
Publisher: Springer Science and Business Media LLC
Date: 29-07-2016
DOI: 10.1038/SREP30703
Abstract: This work shows mixed matrix inorganic membranes prepared by the vacuum-assisted impregnation method, where phenolic resin precursors filled the pore of α-alumina substrates. Upon carbonisation, the phenolic resin decomposed into several fragments derived from the backbone of the resin matrix. The final stages of decomposition ( °C) led to a formation of carbon molecular sieve (CMS) structures, reaching the lowest average pore sizes of ~5 Å at carbonisation temperatures of 700 °C. The combination of vacuum-assisted impregnation and carbonisation led to the formation of mixed matrix of CMS and α-alumina particles (CMS-Al 2 O 3 ) in a single membrane. These membranes were tested for pervaporative desalination and gave very high water fluxes of up to 25 kg m −2 h −1 for seawater (NaCl 3.5 wt%) at 75 °C. Salt rejection was also very high varying between 93–99% depending on temperature and feed salt concentration. Interestingly, the water fluxes remained almost constant and were not affected as feed salt concentration increased from 0.3, 1 and 3.5 wt%.
Publisher: Elsevier BV
Date: 02-2017
Publisher: Royal Society of Chemistry (RSC)
Date: 2015
DOI: 10.1039/C4RA12483A
Abstract: Hydrothermally stable ES40-derived silica matrices with less than 30% pore volume loss are closely associated with a more open silica microstructure formed from thermal consolidation of larger silica particles.
Publisher: MDPI AG
Date: 05-2018
DOI: 10.3390/PR6050047
Publisher: Elsevier BV
Date: 10-2016
Publisher: Elsevier BV
Date: 02-2022
Publisher: American Chemical Society (ACS)
Date: 16-03-2016
Abstract: Single-walled carbon nanotubes (SWCNTs) with proper functionalization are desirable for applications that require dispersion in aqueous and biological environments, and functionalized SWCNTs also serve as building blocks for conjugation with specific molecules in these applications. In this study, we examined the phototransformation of carboxylated SWCNTs and associated amorphous carbon impurities in the presence or absence of H2O2 under simulated sunlight conditions. We found that while carboxylated SWCNTs were rather unreactive with respect to direct solar photolysis, they photoreacted in the presence of H2O2, forming CO2 and strongly aggregated SWCNT products that precipitated. Photoreaction caused SWCNTs to lose oxygen-containing functionalities, and interestingly, the resulting photoproducts had spectral characteristics similar to those of parent carboxylated SWCNTs whose amorphous carbon was removed by base washing. These results indicated that photoreaction of the amorphous carbon was likely involved. The removal of amorphous carbon after indirect photoreaction was confirmed with thermogravimetric analysis (TGA). Further studies using carboxylated SWCNTs with and without base washing indicate that amorphous carbon reduced the extent of aggregation caused by photoreaction. The second-order rate constant for carboxylated SWCNTs reacting with (•)OH was estimated to be in the range of 1.7-3.8 × 10(9) MC(-1) s(-1). The modeled phototransformation half-lives fall in the range of 2.8-280 days in typical sunlit freshwaters. Our study indicates that photosensitized reactions involving (•)OH may be a transformation and removal pathway of functionalized SWCNTs in the aquatic environment, and that the residual amorphous carbon associated with SWCNTs plays a role in SWCNT stabilization.
Publisher: Elsevier BV
Date: 03-2014
Publisher: IOP Publishing
Date: 02-2017
Publisher: Elsevier BV
Date: 02-2022
DOI: 10.1016/J.CHEMOSPHERE.2021.132612
Abstract: Forward osmosis membrane bioreactors (FOMBRs) are currently gaining attention from the wastewater treatment industry, for their potential to produce high effluent quality and a relatively better flux stability against fouling. However, only using physical cleaning methods is not sufficient to recover the water flux performance satisfactorily under a long-term operation. This study comprehensively investigated the efficiency of a hybrid, environmentally-friendly cleaning strategy involving a combination of physical and free nitrous acid (FNA) cleanings under a long-term FOMBR operation. During 92 days of FOMBR operation, physical cleaning recovered the water flux by 85%, whilst FNA cleaning contributed to an additional 5% of the recovery. In addition, FNA cleaning also offered a retardation of fouling deposition by maintaining the water flux 18-30% more than that obtained by only the physical cleaning. A possible mechanism for FNA's role as the cleaning reagent was proposed for the first time in this study based on the water flux performance and membrane autopsy analysis. The results showed FNA cleaning broke down the residual fouling layer, preferencing protein-based substances. A lower ratio of protein to polysaccharides of the residual fouling layer contributed to a more negatively charged membrane surface (- 42.34 ± 0.30 mV) compared to the virgin one (- 17.54 ± 0.81 mV). This resulted in a stronger electrostatic repulsion between the foulants and the membrane surface, and thus slowed down the biofouling deposition process. This study suggested FNA solution has the great potential not only to recover the membrane performance, also as a strategy to slow down fouling deposition.
Publisher: Wiley
Date: 24-09-2013
DOI: 10.1002/POLA.26930
Publisher: Elsevier BV
Date: 08-2022
Start Date: 2014
End Date: 2015
Funder: University of Queensland
View Funded ActivityStart Date: 2015
End Date: 07-2019
Amount: $340,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 04-2019
End Date: 03-2024
Amount: $450,000.00
Funder: Australian Research Council
View Funded Activity