Journal
CHEMICAL COMMUNICATIONS
Volume 58, Issue 73, Pages 10202-10205Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc02237k
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In this study, we successfully synthesized water-dispersible Nb2CTZ nanosheets via molten salt etching and a washing method. We found that the MXenes etched by molten salts showed slower oxidation behavior, which may be attributed to the decreased amount of oxygen-containing terminal groups.
Despite numerous prior reports of molten salt etching of MAX phases, few of these reports achieved water-dispersible MXene nanosheets, and none for Nb-based MXenes. Here we demonstrate the synthesis and aqueous dispersibility of Nb2CTZ nanosheets via molten salt etching and utilizing a KOH wash to add hydroxyl surface groups. However, little is known about the oxidation of molten salt etched MXenes compared to acid-etched MXenes. Our results indicate slower oxidation behavior for MXenes etched by molten salts, which may be due to the decreased amount of oxygen-containing terminal groups.
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