Effect of oxidation degree of GO nanosheets on microstructure and performance of polysulfone-GO mixed matrix membranes

Zambare, Rahul S.; Dhopte, Kiran B.; Nemade, Parag R.; Tang, Chuyang Y.

doi:10.1016/j.seppur.2020.116865

Cited by 23 publications

(8 citation statements)

References 39 publications

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“…Membrane fouling resulted in a decrease in water flux in all the membranes for pure water and contaminated water, which is clearly shown in Figure 2 . Similar trends were reported in previous studies [ 31 , 32 ]. As shown in Figure 2 , the antifouling behaviour of the membranes was determined, and FRR, R t , R ir, and R r were calculated using Equations (1)–(4), respectively.…”

Section: Resultssupporting

confidence: 92%

“…No significant pressure effect was observed on the FRR of the pristine PSF membrane (P) for pure water, as it was reported to be constantly 0.41 with the pressure change from 2.5 to 6.25 bars, whereas the FRR value increased with the increase in pressure for CP and MCP. The mixed-matrix PSF membranes showed a higher % FRR than the pristine PSF membranes at 6.25 bars due to the presence of composite particles on the PSF matrix, as ZnO and GO enhance the antifouling activity of membranes [ 32 , 33 , 34 ]. Between the two mixed-matrix PSF membranes CP and MCP, MCP had an FRR of 0.78, which was higher than CP (0.57) at 6.25 bar due to the presence of iron oxide in the composite particles in addition to GO and ZnO; iron oxide enhanced the membrane’s hydrophilicity and antifouling activity [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

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Antifouling and Antimicrobial Study of Nanostructured Mixed-Matrix Membranes for Arsenic Filtration

et al. 2023

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Membrane fouling is a major drawback in the membrane filtration industry for water treatment. Mixed-matrix membranes (MMMs) are well known for their enhanced antifouling and antibacterial properties, which could offer potential benefits for membrane filtration processes in the water treatment field. In this work, three electrospun nanofibrous MMMs (P, CP, and MCP, which were, respectively, the pristine polysulfone membrane and mixed-matrix membranes (MMMs) consisting of GO–ZnO and GO–ZnO–iron oxides) were studied for antifouling and antibacterial properties with respect to the arsenic nanofiltration process. The effects of these composites on the antifouling behaviour of the membranes were studied by characterising the bovine serum albumin (BSA) protein adsorption on the membranes and subsequent analysis using microscopic (morphology via scanning electron microscopy) and Brunauer–Emmett–Teller (BET) analyses. The antibacterial properties of these membranes were also studied against Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli). The composite nanoparticle-incorporated membranes showed improved antifouling properties in comparison with the pristine polysulfone (PSF) membrane. The excellent antimicrobial properties of these membranes make them appropriate candidates to contribute to or overcome biofouling issues in water or wastewater treatment applications.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Antifouling and Antimicrobial Study of Nanostructured Mixed-Matrix Membranes for Arsenic Filtration

et al. 2023

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“…Isoelectric point (the pH value where no charge is present at the surface) was used to define the changes in the membrane surface charge due to the GO and ZnO addition to the fiber matrix. The surface zeta potential of the synthesized membranes as a function of pH value is shown in Figure 10 ; the values support the previously reported results [ 80 ]. The polymer electrospun membrane P, where no filler materials were added, has an isoelectric point of 2.6.…”

Section: Resultssupporting

confidence: 88%

Electrospun Composite Nanofiltration Membranes for Arsenic Removal

et al. 2022

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In recent years, significant attention has been paid towards the study and application of mixed matrix nanofibrous membranes for water treatment. The focus of this study is to develop and characterize functional polysulfone (PSf)-based composite nanofiltration (NF) membranes comprising two different oxides, such as graphene oxide (GO) and zinc oxide (ZnO) for arsenic removal from water. PSf/GO- and PSf/ZnO-mixed matrix NF membranes were fabricated using the electrospinning technique, and subsequently examined for their physicochemical properties and evaluated for their performance for arsenite–As(III) and arsenate–As(V) rejection. The effect of GO and ZnO on the morphology, hierarchical structure, and hydrophilicity of fabricated membranes was studied using a scanning electron microscope (SEM), small and ultra-small angle neutron scattering (USANS and SANS), contact angle, zeta potential, and BET (Brunauer, Emmett and Teller) surface area analysis. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to study the elemental compositions and polymer-oxide interaction in the membranes. The incorporation of GO and ZnO in PSf matrix reduced the fiber diameter but increased the porosity, hydrophilicity, and surface negative charge of the membranes. Among five membrane systems, PSf with 1% ZnO has the highest water permeability of 13, 13 and 11 L h−1 m−2 bar−1 for pure water, As(III), and As(V)-contaminated water, respectively. The composite NF membranes of PSf and ZnO exhibited enhanced (more than twice) arsenite removal (at 5 bar pressure) of 71% as compared to pristine PSf membranes, at 43%, whereas both membranes showed only a 27% removal for arsenate.

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“…The increasing formation of amide and –COOH groups in the PA layer ( Figure 4 and Figure 5 ) influences the strength and repeated axes of the hydrogen bonds [ 43 ]. Zhang et al [ 44 ] reported that the close interactions between water and the hydrophilic functional group in the PA layer improves the adsorption capacity of the membrane surface and could enhance the transport of water molecules through the membrane.…”

Section: Resultsmentioning

confidence: 99%

Modification of Thin Film Composite Pressure Retarded Osmosis Membrane by Polyethylene Glycol with Different Molecular Weights

et al. 2022

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An investigation of the effect of the molecular weight of polyethylene glycol (PEG) on thin-film composite (TFC) flat sheet polysulfone membrane performance was conducted systematically, for application in forward osmosis (FO) and pressure retarded osmosis (PRO). The TFC flat sheet PSf-modified membranes were prepared via a non-solvent phase-separation technique by introducing PEGs of different molecular weights into the dope solution. The TFC flat sheet PSf-PEG membranes were characterized by SEM, FTIR and AFM. The PSf membrane modified with PEG 600 was found to have the optimum composition. Under FO mode, this modified membrane had a water permeability of 12.30 Lm−2h−1 and a power density of 2.22 Wm−2, under a pressure of 8 bar in PRO mode, using 1 M NaCl and deionized water as the draw and feed solutions, respectively. The high water permeability and good mechanical stability of the modified TFC flat sheet PSF-PEG membrane in this study suggests that this membrane has great potential in future osmotically powered generation systems.

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Effect of oxidation degree of GO nanosheets on microstructure and performance of polysulfone-GO mixed matrix membranes

Cited by 23 publications

References 39 publications

Antifouling and Antimicrobial Study of Nanostructured Mixed-Matrix Membranes for Arsenic Filtration

Antifouling and Antimicrobial Study of Nanostructured Mixed-Matrix Membranes for Arsenic Filtration

Electrospun Composite Nanofiltration Membranes for Arsenic Removal

Modification of Thin Film Composite Pressure Retarded Osmosis Membrane by Polyethylene Glycol with Different Molecular Weights

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