Selective Pseudocapacitive Deionization of Calcium Ions in Copper Hexacyanoferrate

doi:10.1021/acsami.0c11233

	Selective Pseudocapacitive Deionization of Calcium Ions in Copper Hexacyanoferrate
	Xu, Yingsheng 1,2; Zhou, Hongjian 2; Wang, Guozhong 2; Zhang, Yunxia 2; Zhang, Haimin 2; Zhao, Huijun 2,3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2020-09-16
卷号	12
关键词	capacitive deionization Prussian blue analogues Faradic electrode water softening selective electrosorption
ISSN号	1944-8244
DOI	10.1021/acsami.0c11233
通讯作者	Zhou, Hongjian(hjzhou@issp.ac.cn) ; Zhang, Haimin(zhanghm@issp.ac.cn)
英文摘要	In recent years, the capacitive deionization (CDI) technology has gradually become a promising technology for hard water treatment. Up to now, most of the work for water softening in CDI was severely limited by the inferior selectivity and electrosorption performances of carbon-based electrodes in spite of combining Ca2+-selective ion-exchange resin or membranes. Pseudocapacitive electrode materials that selectively interact with specific ions by Faradic redox reactions or ion (de)intercalation offer an alternative strategy for highly selective electrosorption of Ca2+ from water because of brilliant ion adsorption capacity. Here, we first used copper hexacyanoferrate (CuHCF) as a pseudocapacitive electrode to methodically study the selective pseudocapacitive deionization of Ca2+ over Na+ and Mg2+. Using the hybrid CDI cell consisting of a CuHCF cathode and an activated carbon anode without any ion-exchange membrane, the outstanding Ca2+ electrosorption capacity of 42.8 mg.g(-1) and superior selectivity &(Ca2+/Na+) of 3.05 at a molar ratio of 10:1 were obtained at 1.4 V, surpassing those of the reported carbon-based electrodes. Finally, electrochemical measurements and molecular dynamics (MD) simulations provided an in-depth understanding of the selective pseudocapacitive deionization of Ca2+ ions in a CuHCF electrode. Our study would be helpful for developing high-efficiency selective electrosorption of target charged ions by intrinsic properties of pseudocapacitive materials.
资助项目	National Key R&D Program of China[2017YFA0207202] ; National Natural Science Foundation of China[51872291] ; National Natural Science Foundation of China[51872292]
WOS关键词	CAPACITIVE DEIONIZATION ; ENERGY-CONSUMPTION ; WATER-TREATMENT ; PRUSSIAN BLUE ; DESALINATION ; ELECTRODE ; MEMBRANE ; BATTERY ; REMOVAL ; CATHODE
WOS研究方向	Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000572965700047
资助机构	National Key R&D Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/104166]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhou, Hongjian; Zhang, Haimin
作者单位	1.Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Anhui Key Lab Nanomat & Nanotechnol, CAS Ctr Excellence Nanosci,Inst Solid State Phys, Key Lab Mat Phys,Ctr Environm & Energy Nanomat, Hefei 230031, Peoples R China 3.Griffith Univ, Ctr Clean Environm & Energy, Southport, Qld 4222, Australia
推荐引用方式 GB/T 7714	Xu, Yingsheng,Zhou, Hongjian,Wang, Guozhong,et al. Selective Pseudocapacitive Deionization of Calcium Ions in Copper Hexacyanoferrate[J]. ACS APPLIED MATERIALS & INTERFACES,2020,12.
APA	Xu, Yingsheng,Zhou, Hongjian,Wang, Guozhong,Zhang, Yunxia,Zhang, Haimin,&Zhao, Huijun.(2020).Selective Pseudocapacitive Deionization of Calcium Ions in Copper Hexacyanoferrate.ACS APPLIED MATERIALS & INTERFACES,12.
MLA	Xu, Yingsheng,et al."Selective Pseudocapacitive Deionization of Calcium Ions in Copper Hexacyanoferrate".ACS APPLIED MATERIALS & INTERFACES 12(2020).