文献类型：期刊文献

英文题名：The graphene oxide membrane immersing in the aqueous solution studied by electrochemical impedance spectroscopy

作者：Zhang, Yongjing[1,2];Chen, Zhe[1,2];Yao, Lei[3];Wang, Xiao[4];Fu, Ping[1,2];Lin, Zhidong[1,2]

机构：[1]Wuhan Inst Technol, Hubei Key Lab Plasma Chem & Adv Mat, Wuhan 430205, Hubei, Peoples R China;[2]Wuhan Inst Technol, Sch Mat Sci & Engn, Wuhan 430205, Hubei, Peoples R China;[3]Wuhan Inst Technol, Sch Elect & Informat Engn, Wuhan 430205, Hubei, Peoples R China;[4]East China Univ Sci & Technol, Shanghai 200237, Peoples R China

年份：2018

卷号：5

期号：4

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：;EI(收录号：20193507363288);WOS:【SCI-EXPANDED(收录号:WOS:000431059500001)】；

基金：This work was supported by NSFC (No. 11205118 and 21303054) and the Fundamental Research Funds for the Central Universities (No. 222201715050). All the computation simulation was undertaken with the resources provided from the High Performance Computing Center of East China University of Science and Technology.

语种：英文

外文关键词：GO membrane; interlayer spacing; electrochemical impedance spectroscopy; DFT method; immersing process

摘要：The interlayer spacing of graphene oxide (GO) is a key property for GO membrane. To probe the variation of interlayer spacing of the GO membrane immersing in KCl aqueous solution, electrochemical impedance spectroscopy (EIS), x-ray diffraction (XRD) and computational calculation was utilized in this study. The XRD patterns show that soaking in KCl aqueous solution leads to an increase of interlayer spacing of GO membrane. And the EIS results indicate that during the immersing process, the charge transfer resistance of GO membrane decreases first and then increases. Computational calculation confirms that intercalated water molecules can result in an increase of interlayer spacing of GO membrane, while the permeation of K+ ions would lead to a decrease of interlayer spacing. All the results are in agreement with each other. It suggests that during the immersing process, the interlayer spacing of GO enlarges first and then decreases. EIS can be a promisingly online method for examining the interlayer spacing of GO in the aqueous solution.