Multifunctional graphene oxide–TiO2 microsphere hierarchical membrane for clean water production

Gao, Peng; Liu, Zhaoyang; Tai, Minghang; Sun, Darren Delai; Ng, W.J.

doi:10.1016/j.apcatb.2013.01.014

Cited by 113 publications

(61 citation statements)

References 49 publications

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“…GO-TiO 2 photocatalytic membranes have been prepared by LbL deposition onto PSf support [56], as a microspherical hierarchy onto CA membrane [57], immobilized on alginate hollow fibres via a wet-dry spinning process [58], decorated onto poly(vinylidene difluoride- co -trifluoroethylene) (P(VDF-TrFE)) copolymer fibres and electrospun to prepare nanofibrous mats [59] and immobilized by dip-coating onto ceramic UF and NF monoliths [60]. In all cases increase in membrane flux due to enhanced hydrophilicity and degradation of pollutant under both UV and visible light was observed.…”

Section: Photocatalytic Carbon Nanosheet Membranesmentioning

confidence: 99%

Incorporation of Graphene-Related Carbon Nanosheets in Membrane Fabrication for Water Treatment: A Review

Lawler

2016

Membranes

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The minimization of the trade-off between the flux and the selectivity of membranes is a key area that researchers are continually working to optimise, particularly in the area of fabrication of novel membranes. Flux versus selectivity issues apply in many industrial applications of membranes, for example the unwanted diffusion of methanol in fuel cells, retention of valuable proteins in downstream processing of biopharmaceuticals, rejection of organic matter and micro-organisms in water treatment, or salt permeation in desalination. The incorporation of nanosheets within membrane structures can potentially lead to enhancements in such properties as the antifouling ability, hydrophilicy and permeability of membranes, with concomitant improvements in the flux/selectivity balance. Graphene nanosheets and derivatives such as graphene oxide and reduced graphene oxide have been investigated for this purpose, for example inclusion of nanosheets within the active layer of Reverse Osmosis or Nanofiltration membranes or the blending of nanosheets as fillers within Ultrafiltration membranes. This review summarizes the incorporation of graphene derivatives into polymeric membranes for water treatment with a focus on a number of industrial applications, including desalination and pharmaceutical removal, where enhancement of productivity and reduction in fouling characteristics have been afforded by appropriate incorporation of graphene derived nanosheets during membrane fabrication.

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Section: Photocatalytic Carbon Nanosheet Membranesmentioning

confidence: 99%

Incorporation of Graphene-Related Carbon Nanosheets in Membrane Fabrication for Water Treatment: A Review

Lawler

2016

Membranes

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“…On the one hand, loose deposition of TiO 2 on composite membrane probably limits the charge transfer . On the other hand, the photocatalysis‐enhanced degradation of organic dyes was investigated under UV irradiation only …”

Section: Introductionmentioning

confidence: 99%

“…39 On the other hand, the photocatalysis-enhanced degradation of organic dyes was investigated under UV irradiation only. 40 To solve these problems, noble metals such as Ag and Au are introduced into the photocatalytic process, and the introduction rapidly transfers photogenerated electrons to the metals and effectively restrains the recombination of electron-hole pairs. 41,42 The photocatalytic behavior would be valuable in visible light due to the localized surface plasmon effect (LSPR) of noble metals.…”

Section: Introductionmentioning

confidence: 99%

A novel photocatalytic membrane decorated with RGO‐Ag‐TiO₂ for dye degradation and oil–water emulsion separation

Chen

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND Membrane separation is a promising process for treatment of dye and oily wastewater if the antifouling capacity and recyclability can be improved. In recent years, the development of photocatalytic materials has provided new methods for research into membrane technology. RESULTS In this study, a novel photocatalytic membrane decorated with RGO‐Ag‐TiO2 nanomaterial was fabricated by simple vacuum filtration for degradation of dye and separation of oil–water. First, TiO2 nanowires were prepared for more effective photocatalysis, reduced graphene oxide (RGO)‐Ag‐TiO2 was fabricated by a facile hydrothermal reaction, then it was directly decorated on cellulose acetate (CA) membrane using polyethylene glycol and glutaraldehyde. CONCLUSION The as‐prepared photocatalytic membrane can simultaneously degrade dye and separate oil–water emulsions under visible‐light irradiation in a short time. The membrane has extremely high water flux (191 L m‐2 h‐1) and rejection rates (almost 100%) of dye–oil–water emulsion. More importantly, the photocatalytic membrane shows excellent antifouling capacity and recyclability, and retains relatively stable dye–oil–water permeation flux (about 27.5 L m‐2 h‐1) and high rejection rates (up to 99%) after six cycles of experiments under visible‐light irradiation. Overall, the photocatalytic membrane opens up new avenues for the treatment of wastewater. © 2017 Society of Chemical Industry

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“…To overcome this problem, it is critical to explore a feasible approach for effectively separating photogenerated electron-holes in photocatalytic layer [16][17][18]. Recently, electrochemically assisted photocatalysis, namely photoelectrocatalysis (PEC) has emerged as an effective method for improving photocatalytic activity [19][20][21].…”

Section: ． Introductionmentioning

confidence: 99%

Integration of membrane filtration and photoelectrocatalysis using a TiO2/carbon/Al2O3 membrane for enhanced water treatment

Wang

Chen

et al. 2015

Journal of Hazardous Materials

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Multifunctional graphene oxide–TiO2 microsphere hierarchical membrane for clean water production

Cited by 113 publications

References 49 publications

Incorporation of Graphene-Related Carbon Nanosheets in Membrane Fabrication for Water Treatment: A Review

Incorporation of Graphene-Related Carbon Nanosheets in Membrane Fabrication for Water Treatment: A Review

A novel photocatalytic membrane decorated with RGO‐Ag‐TiO₂ for dye degradation and oil–water emulsion separation

Integration of membrane filtration and photoelectrocatalysis using a TiO2/carbon/Al2O3 membrane for enhanced water treatment

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Multifunctional graphene oxide–TiO2 microsphere hierarchical membrane for clean water production

Cited by 113 publications

References 49 publications

Incorporation of Graphene-Related Carbon Nanosheets in Membrane Fabrication for Water Treatment: A Review

Incorporation of Graphene-Related Carbon Nanosheets in Membrane Fabrication for Water Treatment: A Review

A novel photocatalytic membrane decorated with RGO‐Ag‐TiO2 for dye degradation and oil–water emulsion separation

Integration of membrane filtration and photoelectrocatalysis using a TiO2/carbon/Al2O3 membrane for enhanced water treatment

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A novel photocatalytic membrane decorated with RGO‐Ag‐TiO₂ for dye degradation and oil–water emulsion separation