Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water
	Hu, Chengzhi; Liu, Fangyuan; Lan, Huachun; Liu, Huijuan; Qu, Jiuhui
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2015-05-15
卷号	446 期号:0 页码:359-365
关键词	Electrosorption Capacitive deionization Manganese dioxide Heavy metal Wastewater
英文摘要	MnO2 is an effective adsorbent for many metal ions and a promising electrode material for electrochemical supercapacitors. In this paper, we successfully combined the two functions through preparing a MnO2/carbon fiber (CF) composite as an electrosorptive electrode. The thin MnO2 film was deposited onto CF by an anodic eletrodeposition method. The MnO2/CF electrodes had ideal pseudocapacitive behavior and high capacitive reversibility. The specific capacitance of the MnO2/CF electrode reached a maximum value of 387 F/g, which is quite competitive compared with literature values. At 0.8 V applied potential, the maximum Cu2+ adsorption capacity of the MnO2/CF electrode was 172.88 mg/g, which is more than 2 times higher than common MnO2 adsorbents without an electric field imposed. SEM images showed that MnO2 nanoflowers with several "petals" were uniformly distributed on the CF surface. Enhancement of adsorption by the polarization potential and the unique microstructure of the deposited MnO2 may be the source of the outstanding adsorption ability of the MnO2/CF electrode. The MnO2/CF electrode could be regenerated quickly by reversing the voltage. The deposition time of 1000 s was optimum for achieving maximum capacitance and Cu2+ removal performance. The MnO2/CF composite electrosorptive electrode is a promising candidate for Cu2+ removal from aqueous solution. (C) 2014 Elsevier Inc. All rights reserved.
研究领域[WOS]	Chemistry, Physical
WOS记录号	WOS:000355336100044
公开日期	2016-03-15
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/32825]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Hu, Chengzhi,Liu, Fangyuan,Lan, Huachun,et al. Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2015,446(0):359-365.
APA	Hu, Chengzhi,Liu, Fangyuan,Lan, Huachun,Liu, Huijuan,&Qu, Jiuhui.(2015).Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water.JOURNAL OF COLLOID AND INTERFACE SCIENCE,446(0),359-365.
MLA	Hu, Chengzhi,et al."Preparation of a manganese dioxide/carbon fiber electrode for electrosorptive removal of copper ions from water".JOURNAL OF COLLOID AND INTERFACE SCIENCE 446.0(2015):359-365.