电容去离子
材料科学
异质结
海水淡化
纳米技术
电容感应
电极
原电池
蚀刻(微加工)
化学工程
光电子学
电化学
图层(电子)
膜
电气工程
冶金
生物
工程类
物理化学
遗传学
化学
作者
Siqi Gong,Huibin Liu,Fan Zhao,Yaning Zhang,Huiting Xu,Meng Li,Junjie Qi,Honghai Wang,Chunli Li,Wenchao Peng,Xiaobin Fan,Jiapeng Liu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-03-03
卷期号:17 (5): 4843-4853
被引量:95
标识
DOI:10.1021/acsnano.2c11430
摘要
Capacitive deionization has been considered as a promising solution to the challenge of freshwater shortage due to its high efficiency, low environmental footprint, and low energy consumption. However, developing advanced electrode materials to improve capacitive deionization performance remains a challenge. Herein, the hierarchical bismuthene nanosheets (Bi-ene NSs)@MXene heterostructure was successfully prepared by combining the Lewis acidic molten salt etching and the galvanic replacement reaction, which achieves the effective utilization of the molten salt etching byproducts (residual copper). The vertically aligned bismuthene nanosheets array evenly in situ grown on the surface of MXene, which not only facilitate ion and electron transport as well as offer abundant active sites but also provide strong interfacial interaction between bismuthene and MXene. Benefiting from the above advantages, the Bi-ene NSs@MXene heterostructure as a promising capacitive deionization electrode material exhibits high desalination capacity (88.2 mg/g at 1.2 V), fast desalination rate, and good long-term cycling performance. Moreover, the mechanisms involved were elaborated by systematical characterizations and density functional theory calculations. This work provides inspirations for the preparation of MXene-based heterostructures and their application for capacitive deionization.
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