Tuning the Interlayer Spacings in Dry Graphene Oxide Membranes via Ions

Shanshan Liang; Liuhua Mu; Liang Chen; Jie Jiang; Yizhou Yang; Haiping Fang

doi:10.1002/asia.202000251

Tuning the Interlayer Spacings in Dry Graphene Oxide Membranes via Ions

Chem Asian J. 2020 Aug 3;15(15):2346-2349. doi: 10.1002/asia.202000251. Epub 2020 Apr 7.

Authors

Shanshan Liang^{1

2}, Liuhua Mu², Liang Chen³, Jie Jiang², Yizhou Yang¹, Haiping Fang^{1

2

4}

Affiliations

¹ Department of Physics, East China University of Science and Technology, Shanghai, 200237, China.
² Division of Interfacial Water and Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.
³ Department of Optical Engineering, Zhejiang A&F University, Hangzhou, 311300, China.
⁴ Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China.

PMID: 32212381
DOI: 10.1002/asia.202000251

Abstract

We show the experimental achievement of dry GO membranes with interlayer spacings in the range from 7.09 Å to 8.72 Å, 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-π 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.

Keywords: Graphene oxide membrane; Interlayer spacing; ion-π interaction.

Abstract

Grants and funding