Nitrogen-doped carbon nanotube encapsulated Fe7S8 nanoparticles for the high-efficiency and selective removal of Pb2+ by pseudocapacitive coupling

doi:10.1039/d2en00044j

	Nitrogen-doped carbon nanotube encapsulated Fe7S8 nanoparticles for the high-efficiency and selective removal of Pb2+ by pseudocapacitive coupling
	Gao, Yong 1; Xu, Yingsheng 2,3; Xiang, Shuhong 2,3; Zhang, Xinyuan 2,3; Li, Zhaolei 1; Zhou, Hongjian 2,3
刊名	ENVIRONMENTAL SCIENCE-NANO
	2022-04-12
ISSN号	2051-8153
DOI	10.1039/d2en00044j
通讯作者	Li, Zhaolei(zlli@just.edu.cn) ; Zhou, Hongjian(hjzhou@issp.ac.cn)
英文摘要	Lead (Pb) is one of the most common public hazards in drinking water, and it widely derives from mining, batteries, the waste from dye manufacturing, and so on. To eliminate this critical environmental issue, capacitive deionization (CDI) technology has been recognized as a potential alternative for the highly-efficient capture of Pb ions, owing to its operational convenience, environmental-friendliness, and low cost. In this work, we utilized a melamine foam frame to prepare nitrogen-doped carbon nanotube encapsulated Fe7S8 nanoparticles (Fe7S8@NCNT) via three hydrothermal, carbonization, and sulfidation steps for the pseudocapacitive removal of Pb2+ ions from water. The synergistic effect derived from Fe2+/Fe3+ redox pairs and specific structural design endowed the Fe7S8@NCNT electrode with excellent pseudocapacitance and enhanced CDI performance in comparison with Fe3C@NCNT and Fe7S8@NF. As a result, the exceptional Pb2+ removal capacity reached an experimental maximum value of 223.1 mg g(-1) at 1.2 V with superior cycling stability. The formation of a Pb-S band after the pseudocapacitive coupling of Pb2+ ions on the surface of the electrode was confirmed based on ex situ Raman and XPS studies, suggesting a deep pseudocapacitance electrosorption mechanism for Pb2+ ions. Furthermore, Fe7S8@NCNT showed high selectivity toward Pb2+ under competition from ubiquitous Na+ and Ca2+ ions at relatively high concentrations, considering practical applications, and this is also supported by density functional theory (DFT) calculations. Thus, Fe7S8@NCNT can show great promise as a cathode for removing heavy metal Pb2+ ions from water.
资助项目	National Natural Science Foundation of China[51872291] ; National Natural Science Foundation of China[51903111] ; National Natural Science Foundation of China[51502296] ; Key research and development projects of Anhui Province[202104a06020028] ; Collaborative Innovation Program of Hefei Science Center, CAS[2020HSC-CIP012] ; presidential Foundation of Hefei Institutes of Physical Science, Chinese Academy of Sciences[YZJJZX202018]
WOS关键词	PB(II) ; ENERGY ; PHOSPHORUS ; ELECTRODE ; WATER ; THERMODYNAMICS ; ADSORPTION ; CELLULOSE ; CAPACITY ; ANODE
WOS研究方向	Chemistry ; Environmental Sciences & Ecology ; Science & Technology - Other Topics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000787363200001
资助机构	National Natural Science Foundation of China ; Key research and development projects of Anhui Province ; Collaborative Innovation Program of Hefei Science Center, CAS ; presidential Foundation of Hefei Institutes of Physical Science, Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/131426]
专题	中国科学院合肥物质科学研究院
通讯作者	Li, Zhaolei; Zhou, Hongjian
作者单位	1.Jiangsu Univ Sci & Technol, Sch Mat Sci & Engn, Dept Polymer Mat, Zhenjiang 212003, Jiangsu, Peoples R China 2.Chinese Acad Sci, Inst Solid State Phys, Ctr Environm & Energy Nanomat, Key Lab Mat Phys,HFIPS, Hefei 230031, Peoples R China 3.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Gao, Yong,Xu, Yingsheng,Xiang, Shuhong,et al. Nitrogen-doped carbon nanotube encapsulated Fe7S8 nanoparticles for the high-efficiency and selective removal of Pb2+ by pseudocapacitive coupling[J]. ENVIRONMENTAL SCIENCE-NANO,2022.
APA	Gao, Yong,Xu, Yingsheng,Xiang, Shuhong,Zhang, Xinyuan,Li, Zhaolei,&Zhou, Hongjian.(2022).Nitrogen-doped carbon nanotube encapsulated Fe7S8 nanoparticles for the high-efficiency and selective removal of Pb2+ by pseudocapacitive coupling.ENVIRONMENTAL SCIENCE-NANO.
MLA	Gao, Yong,et al."Nitrogen-doped carbon nanotube encapsulated Fe7S8 nanoparticles for the high-efficiency and selective removal of Pb2+ by pseudocapacitive coupling".ENVIRONMENTAL SCIENCE-NANO (2022).