Copper hexacyanoferrate/carbon sheet combination with high selectivity and capacity for copper removal by pseudocapacitance

Guoqing Wu,Hongyu Wang, Lei Huang,Jia Yan,Xuanxuan Chen, Huabing Zhu, Yi Wu, Shumei Liu, Xiaozhen Shen, Weiqi Liu,Xianjie Liu,Hongguo Zhang

Journal of Colloid and Interface Science（2024）

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Abstract

•An efficient CuHCF/C electrode was prepared for Cu2+ removal by CDI.•CuHCF/C achieved high Cu2+ adsorption capacity of 134.47 mg g−1 at low applied voltage of 0.8 V.•CuHCF/C manifested excellent Cu2+ selectivity in multi-ion coexisting solution.•The mechanism of removing Cu2+ by Faradaic pseudocapacitance was explained.

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Key words

Capacitive deionization,Prussian blue analogs,Copper removal,Copper ion selectivity,High adsorption capacity

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