膜
催化作用
纳米-
材料科学
纳米技术
化学工程
化学
复合材料
工程类
有机化学
生物化学
作者
Chenchen Meng,Wenliang Feng,Shaoze Zhang,Lihua Zhao,Shengchao Zhao,Hao Wang,Q. Jason Niu
标识
DOI:10.1016/j.apcatb.2024.124449
摘要
Membrane-confined catalysis technologies have demonstrated the promise for continuous and efficient catalytic generation of reactive oxygen species (ROSs) to degrade organic pollutants. However, constructing improved membranes with feasible sub-/nanometer-confined spaces, adequate catalytic activity, and superior stability remains a major challenge for practical applications. Herein, we report the demonstration of a nano-confined catalytic membrane (CoFe-DSAC@GO) composed of bimetallic Co–Fe single-atoms anchored on nitrogen-doped carbon nanosheets and graphene oxide. The CoFe-DSAC@GO membrane exhibits 100 % removal efficiency with high water permeance (137 L m−2 h−1 bar−1), rapid degradation kinetics (0.41 ms–1), and excellent catalytic stability over 72 h. The nano-confined spaces in the CoFe-DSAC@GO membrane facilitate the generation and utilization of ROSs and catalytic activity. Furthermore, theoretical calculations elucidate that the electron transfer among bimetallic Co–Fe single-atom sites promotes peroxymonosulfate (PMS) activation. This work advances the mechanistic understanding and application potential of diatomic synergy in membrane-based nano-confined catalysis for water purification.
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