MXene‐Polymer Hybrid for High‐Performance Gas Sensor Prepared by Microwave‐Assisted In‐Situ Intercalation
Jin Zhou, Seyed Hossein Hosseini Shokouh, Hannu‐Pekka Komsa, Lassi Rieppo, Linfan Cui, Zhong‐Peng Lv, Krisztián Kordás
Abstract
Abstract 2D transition‐metal carbides (Ti 3 C 2 T x MXene) intercalated with organic molecules have been widely used in batteries and supercapacitors, but are quite rarely reported for gas sensing. Since Ti 3 C 2 T x is sensitive to oxygen, most methods for preparing the intercalated Ti 3 C 2 T x involve stirring the reactants with Ti 3 C 2 T x for several hours under nitrogen protection. Herein, a method to prepare a hybrid of Ti 3 C 2 T x and intercalated polysquaraine through microwave‐assisted in situ polymerization that takes only a few minutes without the need of using a protective atmosphere is demonstrated. Owing to the increased interlayer space of the Ti 3 C 2 T x after the polymerization, the gas sensors based on the hybrid exhibit a good sensing performance for NH 3 detection, being able to detect at least 500 ppb NH 3 with a 2.2% ppm −1 of sensitivity. This study provides a facile preparation method for developing intercalated MXenes, which are expected to be useful for a wide range of applications.