Polysulfone porous hollow fiber membranes for ethylene-ethane separation in gas-liquid membrane contactor

Ovcharova, A. A.; Vasilevsky, Vladimir; Borisov, Ilya L.; Баженов, С. Л.; Волков, А. В.; Bildyukevich, A. V.; Волков, В. В.

doi:10.1016/j.seppur.2017.03.023

Cited by 56 publications

(28 citation statements)

References 44 publications

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“…And some remarkable achievements have been obtained. Compared with the solid materials, the porous and hollow structures have been extensively investigated because of their widespread promising application scenarios in multiple areas, for example catalysis, 16 molecular separation, 17 photonics, 18 and gas sensors. 19 In general, the preparation of hollow structure utilizes the removable or sacricial hard and so templates, 20,21 which limits the crystallization, the grain size-distribution and the purity of products because of the high temperature heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties

Mao

Tao

et al. 2020

RSC Adv.

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Bismuth vanadate (BiVO 4 ) hollow spheres with porous structure have been successfully fabricated by a onestep wet solution method with no surfactant and template. The structure, morphologies, and composition of the as-prepared products were studied with X-ray powder diffraction (XRD), transmission electron morphology (TEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS) and UV-vis spectroscopy. Based upon the time-dependent experimental results, BiVO 4 nanospheres with hollow and solid structures can be controlled effectively through the reaction time, and a reasonable formation process was suggested in this work. Moreover, the experiment of degrading methyl orange (MO) under visible-light illumination was conducted to evaluate the photocatalytic performance of the obtained BiVO 4 samples. The porous BiVO 4 hollow spheres exhibit superior visible-light photocatalytic properties for MO degradation than other photocatalysts under irradiation, and could be reused for up to five times without significant reduction in the photocatalytic activity. In addition, based on active group trapping experiments, cOH radicals as the main active species from H 2 O 2 molecules play a vital role in the photocatalytic degradation of MO, and a photocatalytic mechanism for the BiVO 4 system was proposed. High photocatalytic activity, universality and stability suggest that the porous BiVO 4 hollow spheres may have potential applications in wastewater treatment. † Electronic supplementary information (ESI) available: (1) SEM images of BiVO 4 hollow spheres; (2) XPS spectra; (3) SEM images of BiVO 4 solid spheres; (4) XRD patterns; (5) effect of H 2 O 2 amount on photocatalytic degradation rate of MO in the presence of BiVO 4 hollow spheres; (6) PL spectra. SeeFig. 5 (a) Absorption spectra of MO aqueous solutions in the presence of BiVO 4 hollow spheres, (b) degradation rate of MO at different intervals and (c) pseudo-first-order kinetic plots of MO in the presence of various photocatalysts.This journal is

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Section: Introductionmentioning

confidence: 99%

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties

Mao

Tao

et al. 2020

RSC Adv.

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“…Polysulfone (PSf) and polyethersulfone (PES) are among the most widely used commercial bulk polymers in the fabrication of different kinds of separation membranes [1][2][3][4]. Their good mechanical properties, high chemical resistance, and easy-to-process make these membrane materials attractive for the spinning of hollow fiber membranes suitable for a broad range of applications such as micro-, ultra-, and nanofiltration, gas separation, membrane contactors [5][6][7][8]. The general approach for the fabrication of integrally skinned asymmetric hollow fiber membranes is the non-solvent induced phase separation (NIPS) method when the polymer is coagulated from its solution by the contact with "poor" solvent (e.g., water).…”

Section: Introductionmentioning

confidence: 99%

Effect of Temperature Exposition of Casting Solution on Properties of Polysulfone Hollow Fiber Membranes

Borisov

Vasilevsky

Matveev

et al. 2019

Fibers

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It was shown for the first time that the conditions of thermal treatment of the casting solution significantly affect the morphology and transport properties of porous, flat, and hollow fiber polysulfone (PSf) membranes. It is ascertained that the main solution components that are subjected to thermo-oxidative destruction are the pore-forming agent polyethylene glycol (PEG) and solvent N-methyl-2-pyrrolidone (NMP). It is proved that hydroxyl groups of PEG actively react in the process of the casting solution thermo-oxidative destruction. It is shown that despite the chemical conversion taking place in the casting solution, their stability towards coagulation virtually does not change. The differences in the membrane morphology associated with the increase of thermal treatment time at 120 °C are not connected to the thermodynamic properties of the casting solutions, but with the kinetics of the phase separation. It is revealed that the change of morphology and transport properties of membranes is connected with the increase of the casting solution viscosity. The rise of solution viscosity resulted in the slowdown of the phase separation and formation of a more densely packed membrane structure with less pronounced macropores. It is determined experimentally that with the increase of casting solution thermal treatment time, the membrane selective layer thickness increases. This leads to the decrease of gas permeance and the rise of the He/CO2 selectivity for flat and hollow fiber membranes. In the case of hollow fibers, the fall of gas permeance is also connected with the appearance of the sponge-like layer at the outer surface of membranes. The increase of selectivity and decline of permeance indicates the reduction of selective layer pore size and its densification, which agrees well with the calculation results of the average membrane density. The results obtained are relevant to any polymeric casting solution containing NMP and/or PEG and treated at temperatures above 60 °C.

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“…Of these, hollow fibre membrane has the characteristics of self‐support, high packing density and high filtration efficiency. It has been widely used in chemicals, food, pharmaceuticals, textiles, water treatment and other fields …”

Section: Introductionmentioning

confidence: 99%

Preparation of carboxylated graphene oxide nanosheets/polysulphone hollow fibre separation membranes with improved separation and dye adsorption properties

Shi

Zeng

et al. 2019

Coloration Technology

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Novel hollow fibre polysulphone (PSF) separation membranes were prepared via the incorporation of carboxylated graphene oxide (cGO) in membrane matrix during the dry‐wet spinning process to improve the membrane performance of water flux and dye adsorption. The surface composition and morphology of the prepared cGO‐incorporated hollow fibre membranes were characterised by means of Fourier Transform–infrared spectra and scanning electron microscopy. The effects of different cGO contents on membrane surface hydrophilicity, separation performance, anti‐compaction and adsorption properties were investigated through measurements of the water contact angle, cross‐flow filtration and methylene blue (MB) adsorption experiments. The results demonstrated that the cGO‐incorporated membranes had more hydrophilic surfaces, higher permeation flux, better anti‐compaction properties and a higher adsorption rate of MB than that of the PSF control membrane. When cGO content was 0.45 wt.%, the pure water flux of the modified membrane increased from 90.56 to 148.26 l m−2 h−1 at 0.1 MPa; also, rejections of bovine serum albumin and polyethylene glycol (PEG‐20000) maintained relatively high values of 98.81 and 93.89%, respectively. The incorporation of cGO nanosheets could effectively improve membrane anti‐compaction properties and the adsorption rate of MB.

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Polysulfone porous hollow fiber membranes for ethylene-ethane separation in gas-liquid membrane contactor

Cited by 56 publications

References 44 publications

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties

Effect of Temperature Exposition of Casting Solution on Properties of Polysulfone Hollow Fiber Membranes

Preparation of carboxylated graphene oxide nanosheets/polysulphone hollow fibre separation membranes with improved separation and dye adsorption properties

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Polysulfone porous hollow fiber membranes for ethylene-ethane separation in gas-liquid membrane contactor

Cited by 56 publications

References 44 publications

Facile fabrication of porous BiVO4hollow spheres with improved visible-light photocatalytic properties

Facile fabrication of porous BiVO4hollow spheres with improved visible-light photocatalytic properties

Effect of Temperature Exposition of Casting Solution on Properties of Polysulfone Hollow Fiber Membranes

Preparation of carboxylated graphene oxide nanosheets/polysulphone hollow fibre separation membranes with improved separation and dye adsorption properties

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Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties

Facile fabrication of porous BiVO₄hollow spheres with improved visible-light photocatalytic properties