Novel CNT/MXene composite membranes with superior electrocatalytic efficiency and durability for sustainable wastewater treatment
文献类型： 外文期刊
作者： Zhang, Zezhou 1 ; Li, Wansheng 1 ; Zhao, Boyu 1 ; Yang, Xiuying 1 ; Zhao, Chennan 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, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Key Lab Plant Nutr & Fertilizer,Minist Agr & Rural, Beijing 100081, Peoples R China
关键词： MXene; CNT; Electrocatalysis; Vacuum filtration
期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.3； 五年影响因子：13.2 ）
ISSN： 1385-8947
年卷期： 2024 年 495 卷
页码：
收录情况： SCI
摘要： Self-assembled composite membranes are increasingly acknowledged for their potential in wastewater treatment due to their superior selectivity, high operational efficiency, and environmental sustainability. Nonetheless, challenges such as inadequate removal efficiencies for low molecular weight dyes and significant membrane fouling restrict their broader industrial application. To address these challenges, a structurally stable composite membrane of sodium lignosulfonate carbon nanotubes/alkalized MXene (SLS-CNT/alk-MXene) has been engineered. This membrane employs a polyethersulfone substrate pretreated with dopamine for uniform nanoparticle assembly through a layer-by-layer self-assembly technique. The manufacturing process includes hydrophilic modification of carbon nanotubes with lignosulfonate, followed by alkalization of MXene using sodium hydroxide. Performance evaluation of the M2 composite membrane, with a content ratio of SLS-CNT to alk-MXene of 4:2 by weight, revealed outstanding membrane properties. It achieved high selective permeability, with over 99 % retention efficiency for Methyl Blue and Congo Red, and a permeation flux of 51.6 L m-2h- 1 bar-1. This membrane efficiently degraded various organic dyes within 1h, including Methyl Orange, Methylene Blue, Malachite Green, and Rhodamine B, and thanks to the integration of electrocatalysis with membrane separation, while maintaining a low membrane resistance of only 813 Omega. After environmentally sustainable testing, the membrane displayed excellent stability and 80 % recovery capacity, presenting a novel approach and design blueprint for enhancing clean water resources and environmental protection.
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