TY - JOUR
T1 - Improving oxidation stability of 2D MXenes
T2 - synthesis, storage media, and conditions
AU - Iqbal, Aamir
AU - Hong, Junpyo
AU - Ko, Tae Yun
AU - Koo, Chong Min
N1 - Funding Information:
This work was supported by a grant from the Basic Science Research Program (2017R1A2B3006469) through the National Research Foundation of Korea funded by the Ministry of Science, ICT and Future Planning, and Construction Technology Research Project (19SCIP-B146646-02) funded by the Ministry of Land, Infrastructure and Transport, Republic of Korea. C. M. Koo also acknowledges the internal programs of KIST, Korea University, and KU-KIST.
Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12
Y1 - 2021/12
N2 - 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.
AB - 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.
KW - Chemical etching
KW - Defect passivation
KW - MXene
KW - Organic dispersion
KW - Oxidation kinetics
KW - Polymer composite
KW - Storage condition
KW - Two-dimensional (2D) nanomaterials
UR - http://www.scopus.com/inward/record.url?scp=85102561573&partnerID=8YFLogxK
U2 - 10.1186/s40580-021-00259-6
DO - 10.1186/s40580-021-00259-6
M3 - Review article
AN - SCOPUS:85102561573
SN - 2196-5404
VL - 8
JO - Nano Convergence
JF - Nano Convergence
IS - 1
M1 - 9
ER -