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Fabrication of TiO2/MWNTs/Al2O3 composite membrane and its performance in water treatment

Authors： LI Huanxia, ZHAO Huanxin, YU Hongtao, CHEN Shuo, QUAN Xie

Units： Key Laboratory of Industrial Ecology and Environmental Engineering, School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China

KeyWords： TiO2; MWNTs; ceramic membrane; CVD; humic acid

ClassificationCode：TQ028.8；O643.36；X524

year,volume(issue):pagination： 2014,34(4):26-32

Abstract：

TiO2/Multi-Walled Nanotubes(MWNTs)/Al2O3 composite membrane was successfully fabricated by a two-step approach involving vacuum filtration of MWNTs suspension followed by chemical vapor deposition (CVD) of TiO2. The pore size of the as-prepared membrane was controlled by the deposition time of TiO2.Considering membrane flux and rejection as well as photocatalytic performance of composite membrane, the optimal deposition time of TiO2 was determined to be 10 min according to the experimental results. DRS results showed that TiO2/MWNTs/Al2O3 composite membrane exhibited better UV light absorption than bare TiO2/Al2O3 composite membrane. EDX map demonstrated that TiO2 was distributed well on the surface of interweaving MWNTs membrane. 15 mg?L-1 of Humic Acid (HA) was used as a target pollutant to investigate the water treatment performance of the composite photocatalytic membrane. By coupling membrane separation with photocatalysis technique, the removal efficiency of HA was 80.9% within 60 min, which was improved 12.2% when compared to membrane separation alone during the same time. HA permeate ?ux of ?ltration with UV light irradiation was 70.9% higher than that without UV after 5 h running, thus indicating good antifouling property of the composite membrane.

Funds：

国家自然科学基金项目(21077018)

AuthorIntro：

李焕霞（1988-），女，湖北武汉市人，硕士研究生，主要从事光催化膜水处理技术的研究，Email：lihuanxia1988 @126.com.*通讯作者，Email：shuochen@dlut.edu.cn

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