化学工程
膜
光催化
吸附
多孔性
聚乙二醇
材料科学
地下水修复
甲基蓝
甲基橙
相位反转
降级(电信)
聚合物
化学
环境修复
有机化学
复合材料
催化作用
污染
工程类
生物
电信
生物化学
计算机科学
生态学
作者
Xiaocan Liu,Lingling Wang,Xuefei Zhou,Xiaohong He,Meirong Zhou,Kun Jia,Xiaobo Liu
标识
DOI:10.1016/j.jpcs.2021.110094
摘要
Dual functional separation membranes that enable the adsorption and subsequent degradation of organic dyes are highly demanded in the environmental remediation. In this study, the hybrid porous membrane has been fabricate via the phase inversion of an amphiphilic polymer (sulfonated polyarylene ether nitrile, abbreviated as SPEN) by using polyethylene glycol (PEG) and titanium dioxide TiO2 as sacrificial pore-forming agent and photocatalyst, respectively. Furthermore, we found that the loading content of PEG-TiO2 played the decisive role in modulation of the fine morphology and surface wettability of obtained hybrid porous membrane, which in turn determined their adsorption and photocatalytic degradation capacities towards organic dye of methyl blue (MB). More specifically, as the increasing of loading content of PEG-TiO2, the obtained hybrid porous membrane exhibited firstly increased and then decreased equilibrium water content (EWC) and porosity, leading to their similar variation of adsorption capacities towards MB. On the contrary, the increased loading content of PEG-TiO2 renders the obtained hybrid porous membrane with larger pore size and more hydrophilic surface, which contributed to the enhanced in-situ photocatalytic degradation of adsorbed MB, and as high as 99.9% adsorbed MB by hybrid porous membrane can be in-situ photo-catalytically degraded under optimized condition. Meanwhile, the MB adsorption and photocatalytic degradation capacities of the optimized hybrid porous membrane can be well preserved after re-generation for three times. Based on these results, the current work basically opens new ways to fabricate multifunctional re-useable porous membrane for environmental remediation application.
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