标题：A dual regulation strategy for MXene-based composite membrane to achieve photocatalytic self-cleaning properties and multi-functional applications

入藏号：WOS:000799614900003

中国科学院文献情报中心期刊分区：工程技术1区/TOP（2022）

本校作者：林清泉; 曾广勇*; 蒲生彦；颜贵龙

来源出版物：CHEMICAL ENGINEERING JOURNAL  卷: 443  文献号: 136335

出版年：2022

第一地址： 成都理工大学

关键词：Dual regulation；MXene nanosheets；Photocatalytic membrane；Self-cleaning mechanism；Multi-functional applications

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摘要：The development of two-dimensional (2D) membrane materials is limited by their relatively low antifouling performance. The high oxidation activity of photocatalytic technology can degrade the contaminants depositing on the membrane, which is expected to solve the problem of membrane fouling. Here, we reported a dual regulation strategy to construct a composite membrane, including chitosan modified MXene nanosheets as separation layer as well as g-C3N4 photocatalyst blended PVDF membrane as support layer. Scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) are used to verify the successful preparation of the dual interface composite membrane. Experimental results showed that the novel composite membrane exhibited high water permeability as well as achieved excellent rejection of anionic dyes and heavy metal ions (Congo red: over 98 % and Cr6+: 85.4%). Owing to photocatalytic activity, the composite membrane almost completely removed rhodamine B and tetracycline hydrochloride, and its selfcleaning ability improved the anti-fouling performance. Based on density functional theory, we further confirmed that the strong photocatalytic activity of the composite membrane was attributed to the efficient charge transfer between the photocatalytic support layer and the MXene separation layer. This work not only deepened the study of 2D-based materials in membrane preparation, but also provided a new dual regulation strategy to enhance multi-pollutants removal by composite membranes in wastewater treatment.

文章链接地址: https://www.sciencedirect.com/science/article/pii/S1385894722018307?via%3Dihub