Electrochemical degradation of small molecule dyes by TiO2-decorated polyacrylonitrile nanofiber membranes with superior properties
文献类型： 外文期刊
作者： Yang, Xiuying 1 ; Zhao, Chennan 1 ; Zhang, Zezhou 1 ; Zhao, Boyu 1 ; Wang, Wenyi 1 ; Yang, Xiangdong 4 ; Shen, Ao 1 ; Ye, Meiqi 1 ;
作者机构： 1.Tiangong Univ, Sch Mat Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China
2.Tiangong Univ, Sch Mat Sci & Engn, Key Lab Hollow Fiber Membrane Mat & Membrane Proc, Tianjin 300387, Peoples R China
3.Tiangong Univ, Sch Mat Sci & Engn, Tianjin Key Lab Hollow Fiber Membrane Mat & Proc, Tianjin 300387, Peoples R China
4.Chinese Acad Agr Sci, Minist Agr & Rural Affairs, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China
关键词： TiO2/PAN NFM; Magnetron sputtering; Electrocatalysis; Dye removal; Electro-cleanable
期刊名称：JOURNAL OF MEMBRANE SCIENCE （ 影响因子：8.4； 五年影响因子：8.1 ）
ISSN： 0376-7388
年卷期： 2024 年 709 卷
页码：
收录情况： SCI
摘要： To optimize the uniform dispersion of nanoparticles and enhance their catalytic degradation effect on small molecule dyes in textile wastewater, titanium dioxide (TiO2) was deposited on polyacrylonitrile (PAN) fiber membranes using magnetron sputtering technology, and TiO2/PAN nanofiber membrane (NFM) with low content and high catalytic efficiency was successfully prepared. Through membrane separation coupling electrocatalysis, the composite membranes exhibited outstanding performance in removing Congo red (CR), Sunset yellow (SY), Methyl orange (MO), and Methylene blue (MB) dyes, with removal rates of 99.5%, 98.8%, 98.5%, and 87.2% respectively. Even after continuous catalysis for 10 h, the composite membranes maintained a high dye removal rate, demonstrating their remarkable stability and water treatment capabilities. Furthermore, TiO2/ PAN NFMs displayed high pure water permeance, dye permeance, and mechanical strength. Specifically, M20 (magnetron sputtering time of 20 min) showed water permeance and dye (SY) permeance values of 1944 L & sdot;m- 2 & sdot;h- 1 & sdot;bar- 1 and 816 L & sdot;m- 2 & sdot;h- 1 & sdot;bar- 1, respectively, and indicate superior mechanical and electrochemical properties. During the electrocatalytic process, TiO2/PAN NFMs generated reactive oxygen species (ROS) on the surface, imparting a self-cleaning property that extended the service life of the membranes and offered an effective solution for textile wastewater treatment.
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