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Preparation and Properties of Photocatalytic Separation Composite Membrane of PPy/TiO2/CS@PTFE

Authors： ZENG Anran, ZHUANG Jinlong, SHEN Huishan, LI Wei

Units： School of New Materials and Shoes & Clothing Engineering, Liming Vocational University, Quanzhou 362000, China

KeyWords： Photocatalytic-separation membrane; Titanium dioxide; Pyrrole; Chitosan; Polytetrafluoroethylene

ClassificationCode：X52；T19

year,volume(issue):pagination： 2022,42(5):70-78

Abstract：

For improving the photocatalytic and separation effect for the printing and dyeing wastewater treatment, the photocatalytic separation composite membrane of PPy/TiO2/CS@PTFE membrane was prepared by in-situ polymerization on membrane. The structure, and photocatalytic property of PPy/TiO2/CS@PTFE were characterized by FTIR, XRD, SEM, N2 adsorption-desorption, water contact angle, UV-vis spectrum and fluorescence emission spectrum, and the wastewater treatment performance for methylene blue (MB) and hexavalent chromium(Cr(VI)) under full-spectrum xenon lamp light irradiation were investigated. The results showed that PPy/TiO2/CS was stable loaded on PTFE, with specific surface area increased by 4.27 times compared with TiO2 and water contact angle of membrane decreased by 50%. The light absorption intensity of PPy/TiO2/CS@PTFE were enhanced, and the electron-hole recombination rate was reduced. The treatment efficiencies for MB and Cr(VI) were 93% and 86%, respectively. The five-cycle performance of composite membrane for MB was reduced by 15%. The mechanism analysis demonstrated that pollutants can be absorbed and intercepted by the composite membrane, and removed by photocatalytic reaction under the action of active substances such as h+, ·OH and ·O2- .

Funds：

泉州市高层次人才创新创业项目(2017G052)

AuthorIntro：

曾安然(1985-)，女，副教授，博士。研究方向：功能材料的开发与应用。通讯作者：曾安然E-mail：66162363@qq.com

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