文献类型：期刊文献

英文题名：Tuning the Interlayer Spacings in Dry Graphene Oxide Membranes via Ions

作者：Liang, Shanshan[1,2,3];Mu, Liuhua[2,3];Chen, Liang[4];Jiang, Jie[2,3];Yang, Yizhou[1];Fang, Haiping[1,2,3,5]

机构：[1]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai 201800, Peoples R China;[3]Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai 201800, Peoples R China;[4]Zhejiang A&F Univ, Dept Opt Engn, Hangzhou 311300, Peoples R China;[5]Chinese Acad Sci, Shanghai Synchrotron Radiat Facil, Zhangjiang Lab, Shanghai Adv Res Inst, Shanghai 201204, Peoples R China

年份：2020

卷号：15

期号：15

起止页码：2346

外文期刊名：CHEMISTRY-AN ASIAN JOURNAL

收录：;EI(收录号：20201508406517);WOS:【SCI-EXPANDED(收录号:WOS:000525354600001)】；

基金：We thank Prof. Guosheng Shi, Dr. Rongzheng Wan, Dr. Nan Sheng and Prof. Yusong Tu for constructive suggestions. We acknowledge support from the National Natural Science Foundation of China (grant number 11974366, 11875236, U1832150, U1832170), the Deepcomp7000 and ScGrid of Supercomputing Center, Computer Network Information Center of Chinese Academy of Sciences, the Supercomputer Center of CAS and the Shanghai Supercomputer center of China.

语种：英文

外文关键词：Graphene oxide membrane; Interlayer spacing; ion-pi interaction

摘要：We show the experimental achievement of dry GO membranes with interlayer spacings in the range from 7.09 angstrom to 8.72 angstrom, tuned and fixed by salts. We found that the interlayer spacings were dominated by the anions or the groups with negative charges in between the GO membranes. Density functional theory (DFT) calculations reveal that the highly efficient tuning of the interlayer spacing in dry GO membranes is due to ion-pi interactions on the graphene sheets, together with the steric effects of anions in between the GO sheets. The findings are helpful for extending their potential applications including chemical sensors, nanomaterial devices preparation, chemical catalysis and synthesis, and gas separation.