Enhancement of Zn2+ and Ni2+ removal performance using a deionization pseudocapacitor with nanostructured birnessite and its carbon nanotube composite electrodes

doi:10.1016/j.cej.2017.07.066

	Enhancement of Zn2+ and Ni2+ removal performance using a deionization pseudocapacitor with nanostructured birnessite and its carbon nanotube composite electrodes
	Tan, WF; Liu, LH; Qiu, GH; Suib, SL; Liu, F; Zheng, LR; Qin, LH; Zheng LR(郑黎荣)
刊名	CHEMICAL ENGINEERING JOURNAL
	2017
卷号	328 页码:464-473
关键词	Deionization pseudocapacitor Heavy metal ions Birnessite-type MnO2 Carbon nanotubes Constant potential electrolysis
ISSN号	1385-8947
DOI	10.1016/j.cej.2017.07.066
文献子类	Article
英文摘要	Manganese oxides have been widely used as deionization capacitor electrode materials to remove heavy metal ions from aqueous solutions. However, the effect of pseudocapacitive properties of manganese oxides on the removal processes remains elusive. In this work, synthesized nanostructured birnessite-type manganese oxide and birnessite/carbon nanotubes (HB/CNTs) nanocomposites were used as deionization pseudocapacitor electrode materials for Zn2+ and Ni2+ removal from aqueous solution by constant potential electrolysis. The effects of operation potential and introduction of carbon nanotubes (CNTs) on Zn2+ and Ni2+ removal capacities were further investigated. The results demonstrated a significant enhancement of electrochemical removal capacities for Zn2+ and Ni2+ by the pseudocapacitive properties of birnessite and the introduction of CNTs. The Zn2+ and Ni2+ removal capacities of birnessite electrode increased first and then decreased with the decrease of potential from 0.2 to -0.2 V (vs. SCE), and the highest removal capacities for Zn2+ and Ni2+ respectively reached 89.5 and 96.6 mg g (1) when the potential was controlled at 0 V. The HB/CNTs nanocomposite showed higher removal capacities (155.6 mg g (1) for Zn2+ and 158.4 mg g (1) for Ni2+ when the relative content of manganese oxide was 45.6%) and a better cycling stability (about 90% and 88% of the initial Zn2+ and Ni2+ removal capacity were retained after 5 cycles) than birnessite electrode. The present study makes clear the pseudocapacitive mechanism of heavy metal ion removal using birnessite, and proposes a facile method to remove heavy metal ions from aqueous solution. (C) 2017 Elsevier B.V. All rights reserved.
电子版国际标准刊号	1873-3212
WOS关键词	CAPACITIVE DEIONIZATION ; HEAVY-METALS ; AQUEOUS-SOLUTIONS ; ENERGY-STORAGE ; COPPER IONS ; DESALINATION ; MANGANESE ; SUPERCAPACITORS ; ADSORPTION ; WATER
WOS研究方向	Engineering
语种	英语
WOS记录号	WOS:000411118300045
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/285274]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Tan, WF,Liu, LH,Qiu, GH,et al. Enhancement of Zn2+ and Ni2+ removal performance using a deionization pseudocapacitor with nanostructured birnessite and its carbon nanotube composite electrodes[J]. CHEMICAL ENGINEERING JOURNAL,2017,328:464-473.
APA	Tan, WF.,Liu, LH.,Qiu, GH.,Suib, SL.,Liu, F.,...&郑黎荣.(2017).Enhancement of Zn2+ and Ni2+ removal performance using a deionization pseudocapacitor with nanostructured birnessite and its carbon nanotube composite electrodes.CHEMICAL ENGINEERING JOURNAL,328,464-473.
MLA	Tan, WF,et al."Enhancement of Zn2+ and Ni2+ removal performance using a deionization pseudocapacitor with nanostructured birnessite and its carbon nanotube composite electrodes".CHEMICAL ENGINEERING JOURNAL 328(2017):464-473.