Nitrogen–doped GO/TiO2 nanocomposite ultrafiltration membranes for improved photocatalytic performance

Xu, Hang; Ding, Mingmei; Chen, Wei; Li, Yang; Wang, Kang

doi:10.1016/j.seppur.2017.12.003

Cited by 103 publications

(40 citation statements)

References 35 publications

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“…8(d). Similar outcomes were perceived by Xu et al 53 during the dye filtration studies. Flux recovery ratio (FRR) is a significant factor to describe the antifouling analysis of membranes and it is commonly assumed that the upper FRR means improved antifouling performance.…”

Section: Resultssupporting

confidence: 87%

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

Boopathy

Arthanareeswaran

Ashok

2020

J of Chemical Tech & Biotech

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BACKGROUND: Membrane technology is highly applicable to water purification due to its simple operation process. During the treatment of organic wastewater, the organic compounds are deposited on the membrane surface, which leads to membrane fouling. To alleviate this problem, the membrane separation process could be combined with eco-friendly photocatalytic technology. In this regard, facile synthesized nanomaterials, such as sulfonated graphene oxide (SGO), zinc oxide (ZnO), and SGO/ZnO (SGZ) are incorporated in a polyethersulfone (PES) membrane matrix used for antifouling analysis and degradation of organic pollutants in the presence of UV light irradiation. RESULTS: X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) analysis shows that ZnO is bound strongly within the SGO-ZnO nanocomposite. The optical property was also altered for hybrid SGO-ZnO nanocomposite as compared to the ZnO photocatalyst. The physicochemical characterization of PES-SGO, PES-ZnO, and PES-SGZ nanocomposite membranes was studied. Hydrophilicity and water flux are improved with the addition of nanomaterials. Among the membranes, PES-SGZ nanocomposite membranes exhibit maximum water flux and lower contact angle value of 152 L m −2 h −1 and 51.9°, respectively. The photocatalytic activity of the membrane was assessed by organic pollutants under the UV light. The PES-SGZ nanocomposite membrane revealed higher photocatalytic efficiency for crystal violet at 92.3% and ciprofloxacin at 95.1%. CONCLUSION: The modified PES membranes enhanced antifouling and hydrophilic properties. Specifically, the PES-SGZ nanocomposite membrane proved to be a superior material for the effective photodegradation of organic pollutants and it achieved a higher water flux. To conclude, the prepared photocatalytic membrane could have vast potential in the treatment of toxic organic industrial effluents.

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Section: Resultssupporting

confidence: 87%

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

Boopathy

Arthanareeswaran

Ashok

2020

J of Chemical Tech & Biotech

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“…In recent decades, much research has focused on the usage of photocatalysis and degradation of the phenolic compounds . TiO 2 has been extensively investigated among the several metal oxide semiconductor photocatalysts for its high chemical and photochemical corrosion resistance, long‐term stability, acceptable photocatalytic activity, low environmental impact and low cost …”

Section: Introductionmentioning

confidence: 99%

“…5,10,11 TiO 2 has been extensively investigated among the several metal oxide semiconductor photocatalysts 12 for its high chemical and photochemical corrosion resistance, long-term stability, acceptable photocatalytic activity, low environmental impact and low cost. 12,13 Generally, TiO 2 has been utilized as a powder in solution or immobilized form on various substrates like glass. Although these catalysts have considerable photocatalytic efficiency in slurry form, they are considered as an impurity and need to be separated from the solution after the treatment.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

Ehsani

Aroujalian

2019

Polymers for Advanced Techs

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The main objective of this research is to use the photocatalytic properties of PES/TiO2 nanofibers membranes to remove the phenol as a toxic pollutant in various effluents. The uniform fibers in terms of minimum bead formation and fibers diameter were fabricated. Therefore, more TiO2 catalysts are on the surface of the fibers which increase the active surface area of nanoparticles and consequently improve the phenol degradation efficiency. The effects of TiO2 concentration on hydrophilicity, mechanical properties, porosity, mean pore size, and water flux of membranes were studied. The PES/TiO2 nanofibers were evaluated for phenol degradation under UVA irradiation through a transparent membrane module. The amount of removable phenol was analyzed with high‐performance liquid chromatography. Central composite design was used as a statistical experimental design. Finally, the effect of TiO2 content in nanofibers and initial phenol concentrations were investigated as well as pH values in synthetic wastewater, on phenol degradation. The results from analysis of variance (ANOVA) analysis indicated that TiO2 content in nanofibers was the most important and effective parameter on phenol degradation. It was also presented that there is no significant interaction between parameters so that the effect of each parameter was investigated separately. Maximum phenol degradation was 43.0 ± 0.3% and found under conditions of TiO2 content, initial phenol concentration, and pH value of 8%, 120 ppm, and 7, respectively.

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“… Nanosheet Type Materials Application Organic Dye Light WCA Highlights Ref. GO(CC) Stacked TiO 2 -NT(P), Ag-NP(CC), cellulose(S) - MB Vis - complete flux decline, twice the flux of membrane without irradiation [ 205 ] GO(CC) Stacked TiO 2 -NP(P), MCE(S) UF DB, MO UV, Vis 11

no irreversible fouling [ 31 ] N-GO(CC) MMM TiO 2 -NP(P), PSf(S) UF MB UV, Vis 59.2 ± 1.2

FRR-UV = 94.6%, FRR-vis = 90.1% [ 206 ] rGO(CC), TiO 2 (P) Stacked Al 2 ...…”

Section: Nanosheet Induced Fouling Mitigationmentioning

confidence: 99%

2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

et al. 2020

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In this study, the characteristics of different types of nanosheet membranes were reviewed in order to determine which possessed the optimum propensity for antifouling during water purification. Despite the tremendous amount of attention that nanosheets have received in recent years, their use to render membranes that are resistant to fouling has seldom been investigated. This work is the first to summarize the abilities of nanosheet membranes to alleviate the effect of organic and inorganic foulants during water treatment. In contrast to other publications, single nanosheets, or in combination with other nanomaterials, were considered to be nanostructures. Herein, a broad range of materials beyond graphene-based nanomaterials is discussed. The types of nanohybrid membranes considered in the present work include conventional mixed matrix membranes, stacked membranes, and thin-film nanocomposite membranes. These membranes combine the benefits of both inorganic and organic materials, and their respective drawbacks are addressed herein. The antifouling strategies of nanohybrid membranes were divided into passive and active categories. Nanosheets were employed in order to induce fouling resistance via increased hydrophilicity and photocatalysis. The antifouling properties that are displayed by two-dimensional (2D) nanocomposite membranes also are examined.

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Nitrogen–doped GO/TiO2 nanocomposite ultrafiltration membranes for improved photocatalytic performance

Cited by 103 publications

References 35 publications

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

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Nitrogen–doped GO/TiO2 nanocomposite ultrafiltration membranes for improved photocatalytic performance

Cited by 103 publications

References 35 publications

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO2) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution

2D Nanocomposite Membranes: Water Purification and Fouling Mitigation

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Fabrication of electrospun polyethersulfone/titanium dioxide (PES/TiO₂) composite nanofibers membrane and its application for photocatalytic degradation of phenol in aqueous solution