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Constructing porous channels in superhydrophilic polyethersulfone composite nanofibrous membranes for sustainably enhanced photocatalytic activities in wastewater remediation
Composites Science and Technology ( IF 9.1 ) Pub Date : 2021-08-14 , DOI: 10.1016/j.compscitech.2021.108993
Shifan Chen 1 , Yetong Guo 1 , Dandan Yuan 1 , Chao He 1 , Jianxu Bao 1 , Sanjiang Ai 1 , Fang Li 1 , Weifeng Zhao 1 , Yuanting Xu 1 , Changsheng Zhao 1, 2, 3
Affiliation  

Photocatalysis is regarded as one of the most promising technologies to remediate wastewater for environmental friendliness. However, most of the powder photocatalysts still suffer from poor hydrophilicity, easy aggregation and difficult recycling, which have restricted their further applications in wastewater treatment. In this study, we constructed porous and superhydrophilic composite polyethersulfone nanofibrous membranes to load titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) photocatalysts to achieve the UV light and visible light driven photocatalytic degradation for organic contaminants, respectively. Particularly, the resultant mesopores in nanofibers could promote the diffusion of contaminant molecules, facilitate the exposure of photocatalytic active sites, improve the light absorption, and finally enhance the photocatalytic activities. Moreover, benefiting from the further removal of poly(vinylpyrrolidone) during the repetitive reuse process, it was provided with a sustainable enhancement of reusability for the composite nanofibrous membrane, which was superior to most of the traditional wastewater remediation materials. Overall, these encouraging features of porous and superhydrophilic composite nanofibrous membrane not only make it promising candidate for wastewater purification, but also offer new pathways to develop advanced nanofibrous materials for diverse catalysis, adsorption and separation applications in environment remediation.



中文翻译:

在超亲水聚醚砜复合纳米纤维膜中构建多孔通道以持续增强废水修复中的光催化活性

光催化被认为是修复废水以实现环境友好的最有前途的技术之一。然而,大部分粉体光催化剂仍存在亲水性差、易团聚、难以回收等问题,限制了其在废水处理中的进一步应用。在这项研究中,我们构建了多孔和超亲水复合聚醚砜纳米纤维膜来负载二氧化钛 (TiO 2 ) 和石墨氮化碳 (gC 3 N 4) 光催化剂,分别实现紫外光和可见光驱动的有机污染物光催化降解。特别是,纳米纤维中的介孔可以促进污染物分子的扩散,促进光催化活性位点的暴露,提高光吸收,最终提高光催化活性。此外,受益于在重复再利用过程中进一步去除聚乙烯吡咯烷酮,为复合纳米纤维膜提供了可持续增强的可重复利用性,优于大多数传统的废水修复材料。总体而言,多孔和超亲水复合纳米纤维膜的这些令人鼓舞的特征不仅使其成为废水净化的有希望的候选者,

更新日期:2021-08-19
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