Influence of graphene oxide sheets on the pore structure and filtration performance of a novel graphene oxide/silica/polyacrylonitrile mixed matrix membrane

Liu, Qiao; Liu, Lin; Jin, Xin; Wang, Chunlei; Wang, Tonghua

doi:10.1007/s10853-018-1990-4

Cited by 23 publications

(14 citation statements)

References 33 publications

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“…As shown in Figure , three membranes all had the characteristic peaks of PAN polymer chains. The moderate‐intensity peaks from 3300 cm −1 to 3650 cm −1 in the PAN‐SiO 2 and PAN‐TiO 2 membrane's top surfaces are ascribed to OH and NH 2 groups, which demonstrates the surface migration of SiO 2 and TiO 2 nanoparticles generated in situ . And the strong peaks from 500 cm −1 to 1000 cm −1 in the PAN‐TiO 2 membrane's top surfaces are attributed to Ti─O─Ti structures, which indicates more surface migration of TiO 2 nanoparticles than of SiO 2 nanoparticles …”

Section: Resultsmentioning

confidence: 99%

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Inorganic nanoparticles incorporated in polyacrylonitrile‐based mixed matrix membranes for hydrophilic, ultrafast, and fouling‐resistant ultrafiltration

Liu

Pan

et al. 2019

J of Applied Polymer Sci

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Mixed matrix membrane (MMM) structures and performances are greatly affected by the distribution of nanoparticles in the polymeric matrix. Until now, there has been little research on the effects of nanoparticle distribution states on polyacrylonitrile (PAN)‐based MMM structures and performances. In this paper, different intermolecular interactions between nanoparticles and PAN molecules were generated by in situ fabricated amino‐functionalized SiO2 and TiO2 nanoparticles to create absolutely different distribution states of nanoparticles in a PAN matrix. The results indicated that, due to the strong interactions between amino and cyano groups, SiO2 is distributed in the PAN membranes homogeneously, while most of the TiO2 migrates to the membrane's top surfaces or the walls of pores or even escape from the membranes during the nonsolvent index phase separation (NIPS) process. PAN‐TiO2 MMMs have more hydrophilic top surfaces, higher porosity, larger mean pore size, and stronger antifouling performances than pure PAN and PAN‐SiO2 membranes. The PAN‐TiO2 MMMs have an ultrahigh water flux of 1204.6 L/(m2 h), which is more than 44 times that of PAN membranes. And the good pore structures and hydrophilicity of the membranes derived from special interactions between in situ TiO2 nanoparticles and PAN molecules can give high‐performance PAN‐based ultrafiltration membranes a bright future. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47902.

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Section: Resultsmentioning

confidence: 99%

“…PAN‐based MMMs were fabricated in situ by the NIPS process as reported previously . The brief preparation procedure is as follows.…”

Section: Methodsmentioning

confidence: 99%

Inorganic nanoparticles incorporated in polyacrylonitrile‐based mixed matrix membranes for hydrophilic, ultrafast, and fouling‐resistant ultrafiltration

Liu

Pan

et al. 2019

J of Applied Polymer Sci

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“…The finger-like pores for GO-PES membranes were wider as compared to pristine PES membranes. These changes in the membrane structure can be attributed to the hydrophilic nature of GO [57]. The addition of GO in the solution casting mixture made it more hydrophilic, which caused a solvent (NMP) and nonsolvent (water) exchange during the phase inversion to yield this wider finger-like channel effect with increased porosity and the lateral structure formation with increasing GO concentration in the prepared membranes [39,58,59].…”

Section: Characterization Of Go-pes Membranesmentioning

confidence: 99%

Graphene Oxide-PES-Based Mixed Matrix Membranes for Controllable Antibacterial Activity against Salmonella typhi and Water Treatment

Bhatti

Ahmad

Niazi

et al. 2018

International Journal of Polymer Science

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The present work is focused on preparation, characterization, and antibacterial activity evaluation of graphene oxide/polyethersulfone mixed matrix filtration membranes. Graphene oxide (GO) was synthesized via improved Hummer’s method and characterized by XRD, FTIR, and SEM. FT-IR spectra showed the presence of carboxylic acid and hydroxyl groups on GO nanosheets. Different concentrations of the synthesized GO at 0.25, 0.5, and 1.0 wt. % were incorporated in polyethersulfone (PES) matrix via phase inversion method to fabricate GO-PES membranes. Increasing porosity and formation of wider, finger-like channels were observed with increased GO concentrations relative to pristine membranes as evident from scanning electron microscopy (SEM) micrographs of the fabricated membranes. However, membranes prepared with 1 wt. % GO appear to contain aggregation and narrowing of pore morphology. GO-incorporated membranes demonstrated enhanced flux, water-retaining capacities, and wettability as compared to pristine PES membranes. Shake flask and colony counting methods were employed to carry out antibacterial testing of synthesized GO and fabricated GO-PES membranes against Salmonella typhi (S. typhi)—a gram-negative bacteria present in water that is known as causative agent of typhoid. Synthesized GO showed significant reduction up to 70.8% in S. typhi cell count. In the case of fabricated membranes, variable concentrations of GO are observed to significantly influence the percentage viability of S. typhi, with reduction percentages observed at 41, 60, and 69% for 0.25, 0.5, and 1.0 wt. % GO-incorporated membranes relative to 17% in the case of pristine PES membranes. The results indicate a good potential for applying GO/PES composite membranes for water filtration application.

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“…There are various removal methods that are used to remove pollutants from water such as bioreactors [ 14 ], degradation and photodegradation [ 15 – 18 ], filtration [ 19 ], photocatalysis [ 20 , 21 ], photo-Fenton and Fenton-like [ 22 , 23 ], coagulation [ 24 ] and adsorption [ 25 , 26 ]. Among these methods, adsorption is a widely used and most efficient method for wastewater treatment.…”

Section: Introductionmentioning

confidence: 99%

Efficient removal of pharmaceuticals from water using graphene nanoplatelets as adsorbent

et al. 2021

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Recently, pharmaceutical pollutants in water have emerged as a global concern as they give threat to human health and the environment. In this study, graphene nanoplatelets (GNPs) were used to efficiently remove antibiotics sulfamethoxazole (SMX) and analgesic acetaminophen (ACM) as pharmaceutical pollutants from water by an adsorption process. GNPs; C750, C300, M15 and M5 were characterized by high-resolution transmission electron microscopy, Raman spectroscopy, X-ray diffraction and Brunauer–Emmett–Teller. The effects of several parameters viz. solution pH, adsorbent amount, initial concentration and contact time were studied. The parameters were optimized by a batch adsorption process and the maximum removal efficiency for both pharmaceuticals was 99%. The adsorption kinetics and isotherms models were employed, and the experimental data were best analysed with pseudo-second kinetic and Langmuir isotherm with maximum adsorption capacity (Q m ) of 210.08 mg g −1 for SMX and 56.21 mg g −1 for ACM. A regeneration study was applied using different eluents; 5% ethanol-deionized water 0.005 M NaOH and HCl. GNP C300 was able to remove most of both pollutants from environmental water samples. Molecular docking was used to simulate the adsorption mechanism of GNP C300 towards SMX and ACM with a free binding energy of −7.54 kcal mol −1 and −5.29 kcal mol −1 , respectively, which revealed adsorption occurred spontaneously.

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Influence of graphene oxide sheets on the pore structure and filtration performance of a novel graphene oxide/silica/polyacrylonitrile mixed matrix membrane

Cited by 23 publications

References 33 publications

Inorganic nanoparticles incorporated in polyacrylonitrile‐based mixed matrix membranes for hydrophilic, ultrafast, and fouling‐resistant ultrafiltration

Inorganic nanoparticles incorporated in polyacrylonitrile‐based mixed matrix membranes for hydrophilic, ultrafast, and fouling‐resistant ultrafiltration

Graphene Oxide-PES-Based Mixed Matrix Membranes for Controllable Antibacterial Activity against Salmonella typhi and Water Treatment

Efficient removal of pharmaceuticals from water using graphene nanoplatelets as adsorbent

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