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Improving oxidation stability of 2D MXenes: synthesis, storage media, and conditions

Authors
Iqbal, A.Hong, J.Ko, T.Y.Koo, C.M.
Issue Date
16-3월-2021
Publisher
Korea Nano Technology Research Society
Keywords
MXene; Organic dispersion; Oxidation kinetics; Polymer composite; Storage condition; Two-dimensional (2D) nanomaterials; Chemical etching; Defect passivation
Citation
Nano Convergence, v.8, no.1
Indexed
SCIE
SCOPUS
KCI
Journal Title
Nano Convergence
Volume
8
Number
1
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/129070
DOI
10.1186/s40580-021-00259-6
ISSN
2196-5404
Abstract
Understanding and preventing oxidative degradation of MXene suspensions is essential for fostering fundamental academic studies and facilitating widespread industrial applications. Owing to their outstanding electrical, electrochemical, optoelectronic, and mechanical properties, MXenes, an emerging class of two-dimensional (2D) nanomaterials, show promising state-of-the-art performances in various applications including electromagnetic interference (EMI) shielding, terahertz shielding, electrochemical energy storage, triboelectric nanogenerators, thermal heaters, light-emitting diodes (LEDs), optoelectronics, and sensors. However, MXene synthesis using harsh chemical etching causes many defects or vacancies on the surface of the synthesized MXene flakes. Defective sites are vulnerable to oxidative degradation reactions with water and/or oxygen, which deteriorate the intrinsic properties of MXenes. In this review, we demonstrate the nature of oxidative degradation of MXenes and highlight the recent advancements in controlling the oxidation kinetics of MXenes with several promising strategic approaches, including careful control of the quality of the parent MAX phase, chemical etching conditions, defect passivation, dispersion medium, storage conditions, and polymer composites. © 2021, The Author(s).
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