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Study on Preparation and Anti-pollution Property of TiO2/GO/PVDF modified composite Membrane

Authors： WANG Hui-ya

Units： School of Environmental Engineering, Nanjing Institute of Technology, Nanjing 211167, China

KeyWords： Titanium dioxide；PVDF；Composite membrane；Anti-pollution

ClassificationCode：X-1

year,volume(issue):pagination： 2021,41(1):80-88

Abstract：

TiO2 prepared by sol-gel method was modified by GO, by mieans of SEM and XRD analysis showed that the prepared composite particles were uniform mixture of TiO2 and GO, and TiO2 was anatase type with easy dispersion and uniform particle size. We successfully prepared a TiO2/GO/PVDF modified composite membrane by phase inversion method.X-ray diffraction、infrared spectrum and the results of the contact angle analysis showed that TiO2/GO and PVDF were well combined and the GO-TiO2 was transferred to the membrane surface, and the hydrophilicity of the composite membrane surface was enhanced.By means of SEM, it was found that the synergistic effect between GO and TiO2 changed both the channel and average pore size of
TiO2/GO/PVDF modified composite membrane. The combined membrane performance test proved that its hydrophilicity was greatly increased and the pure water flux was up to 203.5L.(M-2.h-1), which was 2.3 times that of pure PVDF membrane and 1.2 times that of TiO2/PVDF membrane,. The negative charge of TiO2/GO was found to increase the electrostatic repulsion of the pollutants. The hydrophilicity of the TiO2/GO /PVDF composite membrane was the highest. The retention rate of bovine serum albumin (BSA) was 91.2%. The TiO2/GO/PVDF composite membrane had a stronger antipollution performance compared with the unmodified and single ultrafiltration membranes, and the pollution recovery rate reached 86.3%

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AuthorIntro：

王慧雅（1978.04-），女，江苏宜兴，副教授，硕士，研究生，从事PVDF膜改性及应用研究，E-mail:whyplgl@njit.edu.cn

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