Mehdi Aghaei Sadegh, Aasi Aref, Panchapakesan Balaji
Small Systems Laboratory, Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts 01609, United States.
ACS Omega. 2021 Jan 20;6(4):2450-2461. doi: 10.1021/acsomega.0c05766. eCollection 2021 Feb 2.
MXenes, two-dimensional (2D) transition metal carbides and nitrides, have been arousing interest lately in the field of gas sensing thanks to their remarkable features such as graphene-like morphology, metal-comparable conductivity, large surface-to-volume ratio, mechanical flexibility, and great hydrophilic surface functionalities. With tunable etching and synthesis methods, the morphology of the MXenes, the interlayer structures, and functional group ratios on their surfaces were effectively harnessed, enhancing the efficiency of MXene-based gas-sensing devices. MXenes also efficiently form nanohybrids with other nanomaterials, as a practical approach to revamp the sensing performance of the MXene sensors. This Mini-Review summarizes the recent experimental and theoretical reports on the gas-sensing applications of MXenes and their hybrids. It also discusses the challenges and provides probable solutions that can accentuate the future perspective of MXenes in gas sensors.
MXenes，即二维（2D）过渡金属碳化物和氮化物，由于其具有类似石墨烯的形态、堪比金属的导电性、大的表面积与体积比、机械柔韧性以及出色的亲水性表面官能团等显著特性，近来在气体传感领域引起了人们的关注。通过可调谐的蚀刻和合成方法，有效地控制了MXenes的形态、层间结构及其表面官能团比例，提高了基于MXene的气体传感装置的效率。MXenes还能与其他纳米材料高效形成纳米复合材料，这是一种改进MXene传感器传感性能的实用方法。本综述总结了近期关于MXenes及其复合材料气体传感应用的实验和理论报告。它还讨论了面临的挑战，并提供了可能的解决方案，这些方案可能会突出MXenes在气体传感器领域的未来前景。
