Supercritical fluid-facilitated exfoliation and processing of 2D materials

Authors

Zhenyu Sun, Beijing University of Chemical Technology, China
Qun Fan, Beijing University of Chemical Technology
Mingli Zhang, Beijing University of Chemical Technology
Shizhen Liu, Beijing University of Chemical Technology
Hengcong Tao, Beijing University of Chemical Technology
John Texter, Eastern Michigan University

Document Type

Article

Publication Date

2019

Department/School

Engineering Technology

Publication Title

Advanced Science

Abstract

Since the first intercalation of layered silicates by using supercritical CO₂ as a processing medium, considerable efforts have been dedicated to intercalating and exfoliating layered two-dimensional (2D) materials in various supercritical fluids (SCFs) to yield single- and few-layer nanosheets. Here, recent work in this area is highlighted. Motivating factors for enhancing exfoliation efficiency and product quality in SCFs, mechanisms for exfoliation and dispersion in SCFs, as well as general metrics applied to assess quality and processability of exfoliated 2D materials are critically discussed. Further, advances in formation and application of 2D material–based composites with assistance from SCFs are presented. These discussions address chemical transformations accompanying SCF processing such as doping, covalent surface modification, and heterostructure formation. Promising features, challenges, and routes to expanding SCF processing techniques are described.

Link to Published Version

10.1002/advs.201901084

Recommended Citation

Sun, Z., Fan, Q., Zhang, M., Liu, S., Tao, H., & Texter, J. (2019). Supercritical fluid‐facilitated exfoliation and processing of 2D materials. Advanced Science, 6(18), 1901084. https://doi.org/10.1002/advs.201901084