Electrochemical synthesis of PANI-ERGO composite electrode and its application in the reduction of hexavalent chromium

doi:10.1016/j.jece.2022.107447

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	Electrochemical synthesis of PANI-ERGO composite electrode and its application in the reduction of hexavalent chromium
	Li, Yanjuan 1,2,3; Wang, Sanfan 1,2; Wu, Nan 1,2; Li, Yanhong 1,2; Zhang, Xuemin 1,2; Ma, Zhihui 4
刊名	Journal of Environmental Chemical Engineering
	2022-06-01
卷号	10 期号:3
关键词	Chromium compounds Composite films Efficiency Electrochemical electrodes Electrolytic reduction Mass transfer Polymer films Semiconducting films Titanium oxides Cr-containing wastewater Electro reduction Electrochemical reduction of graphene oxide Electrochemical reductions Electrochemical synthesis First-order kinetic models Initial concentration Reduction efficiency Ti electrode
ISSN号	2213-2929
DOI	10.1016/j.jece.2022.107447
英文摘要	Electroreduction is a promising approach for toxic Cr (VI) remediation due to its efficiency and excellent environmental compatibility. This study researches the facile electrode preparation and high mass transfer efficiency in Cr (VI) reduction application. Firstly, polyaniline (PANI)/electrochemically reduced graphene oxide (ERGO)/Ti electrode was synthesized in situ on a titanium mesh substrate via a three-step electrochemical method. The pretreated electrodes were characterized by SEM, FTIR, XPS. The EIS and CV were also adopted to prove further at the performance of electron transfer and electrocatalytic activity of Cr (VI) on the interface of the composite film. Subsequently, the reduction efficiency of Cr (VI) was invested in the electroreduction process by the PANI/ERGO/Ti electrode, factors such as potential condition, pH, and initial concentration of Cr (VI) were also considered. It showed higher degradation percentage and current efficiencies of the PANI/ERGO/Ti compared to the PANI/Ti and the ERGO/Ti. And revealed that lower pH is more favorable, and higher initial concentration is more accessible to reduce. The proposed test result reached 99.29% Cr (VI) reduction efficiency with the potential of − 0.8 V, pH of 2, and concentration of Cr (VI) is 10 mg/L within 2 h. Based on the above analysis, reasons for these results may attribute to a combination mechanism of adsorption and electro-reduction. Furthermore, PANI/ERGO/Ti presented good durability and achieved the expected application in actual wastewater in the system. This research could offer an effective strategy for graphene-supported polymer film electrodes which can be utilized for effective electrochemical reduction of Cr (VI)-containing wastewater. © 2022 Elsevier Ltd
WOS研究方向	Engineering
语种	英语
出版者	Elsevier Ltd
WOS记录号	WOS:000790508400004
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157863]
专题	土木工程学院
作者单位	1.Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization , No. 88, Anning West Road, Lanzhou; 730070, China; 2.School of Environment and Municipal Engineering, Lanzhou Jiaotong University, No.88, Anning West Road, Lanzhou; 730070, China; 3.School of Civil Engineering, Lanzhou University of Technology, 287 Langongping, Lanzhou; 730050, China; 4.Tianjin Institute of Surveying and Mapping Co., Ltd, No. 9 Changling Road, XiQing District, Tianjin; 300181, China
推荐引用方式 GB/T 7714	Li, Yanjuan,Wang, Sanfan,Wu, Nan,et al. Electrochemical synthesis of PANI-ERGO composite electrode and its application in the reduction of hexavalent chromium[J]. Journal of Environmental Chemical Engineering,2022,10(3).
APA	Li, Yanjuan,Wang, Sanfan,Wu, Nan,Li, Yanhong,Zhang, Xuemin,&Ma, Zhihui.(2022).Electrochemical synthesis of PANI-ERGO composite electrode and its application in the reduction of hexavalent chromium.Journal of Environmental Chemical Engineering,10(3).
MLA	Li, Yanjuan,et al."Electrochemical synthesis of PANI-ERGO composite electrode and its application in the reduction of hexavalent chromium".Journal of Environmental Chemical Engineering 10.3(2022).