Hydrothermal carbon nanospheres assisted-fabrication of PVDF ultrafiltration membranes with improved hydrophilicity and antifouling performance

Yu, Haixiang; Gu, Lin; Wu, Sifan; Dong, Guangxia; Qiao, Xingbo; Zhang, Kai; Lu, Xiangyu; Wen, Haifeng; Zhang, Daofang

doi:10.1016/j.seppur.2020.116889

Cited by 42 publications

(20 citation statements)

References 64 publications

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“…The pore volume is 0.63 m 3 ·g −1 , water molecules with a diameter of 2.8 Å can enter the hole window of ZIF-8. 24 The hydrophilic group -N-H of ZIF-8 surface is introduced by the terminal Im linker, this allows the water molecules on the surface of the crystal to be absorbed. After the absorbed water molecules enter the pores of ZIF-8, the hydrophobicity of ZIF-8 leads to the reduction of resistance and accelerates the rapid flow of water molecules through the pores to achieve the purpose of intercepting the target solute.…”

Section: Introductionmentioning

confidence: 99%

High performance polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) doped by various zeolite imidazolate frameworks

Liu

Chen

Mao

et al. 2020

High Performance Polymers

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Zeolitic imidazolate framework (ZIF-8) in three particle sizes (40, 70 and 100 nm) was prepared through both solvothermal and hydrothermal methods and employed to decorate polyvinylidene fluoride (PVDF). The finger-like macro-voids, sponge-like poly-porous morphology and surface roughness of prepared membranes were characterized by SEM and AFM microscopy. The FTIR spectrum and XPS analysis bear out the chemical component. ZIF-8 has the characteristics of higher porosity and appropriate pore size, which is a condition for improving the permeability and pollution resistance of the modified membrane. Results indicated that different ZIF-8s have different enhancement effects on PVDF MMM. 100 nm ZIF-8 membrane possessed pure water flux (PWF) of 350 L m−2h−1, which was 10 times more than the bare membrane (30 L m−2h−1), and OVA flux recovery ration (FRR%) is 98%. 40 nm ZIF-8 membrane owned BSA FRR% of 98.4%. The 70 nm ZIF-8 showed the best mechanical properties. The dynamic contact angles of UP-Z70 ranged from 104.5° to 62.5° within 180 s. Furthermore, pore size distribution, molecular weight cut-off (MWCO) and porosity were also researched to evaluate the MMM. The dislodge of Reactive Black KN-B, Reactive Red 3BS and Reactive Brilliant Blue KN-R dyes by MMM were studied under different dye concentrations and transmembrane pressures. The membrane can provide selective separation methods for dyes and Reactive Brilliant Blue KN-R up to 99%. Overall, the permeability, hydrophilicy, anti-fouling performance and wastewater treatment of modified membranes were regulated by the ZIF-8 in a steerable blending reaction modification process.

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Section: Introductionmentioning

confidence: 99%

High performance polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) doped by various zeolite imidazolate frameworks

Liu

Chen

Mao

et al. 2020

High Performance Polymers

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“…A large number of studies have been conducted on the synthesis of carbon spheres by hydrothermal carbonization, such as the structure control of carbon materials [33][34][35], the formation mechanism of carbon spheres [12,[32][33][34], the types of biomass resources [34,35] and their application in energy storage devices [31,36,37]. Through the hydrothermal carbonization process, a large number of oxygen containing functional groups are generated on the outer surface of carbon spheres [38]. During the methanol oxidation reaction, the introduction of these oxygen-containing functional groups may quickly eliminate the poisoning intermediate species [39].…”

Section: Introductionmentioning

confidence: 99%

Size-controllable carbon spheres doped Ni (II) for enhancing the catalytic oxidation of methanol

Gao

et al. 2021

Turk J Chem

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Ni(II)/CSs were prepared using a simple two-step hydrothermal method. The morphology and composition of the catalysts were studied with scanning electron microscope, transmission electron microscope, and X-ray diffraction. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy showed that the surface of the prepared carbon spheres was rich in hydroxyl groups, which was beneficial to remove CO intermediates, and therefore, improving the catalytic efficiency and the antipoisoning ability of the catalysts. The results of cyclic voltammetry and chronoamperometry showed that the electrocatalytic activity and stability of Ni(II)/CSs were higher than that of unloaded NiAc under alkaline environment. When the nickel content was 5 wt.%, the peak oxidation current density of methanol on Ni(II)/CSs electrocatalyst reached the maximum of 34.54 mA/cm 2 , which was about 1.8 times that of unloaded NiAc. These results indicate that Ni(II)/CSs has potential applications in the electrocatalytic oxidation of methanol.

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“…Simultaneously, due to the barrier of hydrated layer, the pollutants deposited on the membrane surface is easier to wash off, thereby greatly improving the antifouling performance of the membranes. [26][27][28] Several modication methods include blending, [29][30][31] coating, 32 surface graing 33,34 and bulk modication, 35 have been developed to improve the hydrophilicity of the polymeric membranes. Among them, blending, especially the physical blending with hydrophilic nanoparticle materials to prepare mixed matrix membranes (MMMs) with improved hydrophilicity has been wildly adopted due to the advantage of easy operation.…”

Section: Introductionmentioning

confidence: 99%

Design of a novel poly(aryl ether nitrile)-based composite ultrafiltration membrane with improved permeability and antifouling performance using zwitterionic modified nano-silica

Dai

Zhang

et al. 2021

RSC Adv.

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Hydrothermal carbon nanospheres assisted-fabrication of PVDF ultrafiltration membranes with improved hydrophilicity and antifouling performance

Cited by 42 publications

References 64 publications

High performance polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) doped by various zeolite imidazolate frameworks

High performance polyvinylidene fluoride (PVDF) mixed matrix membrane (MMM) doped by various zeolite imidazolate frameworks

Size-controllable carbon spheres doped Ni (II) for enhancing the catalytic oxidation of methanol

Design of a novel poly(aryl ether nitrile)-based composite ultrafiltration membrane with improved permeability and antifouling performance using zwitterionic modified nano-silica

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