MXene is a novel class of two-dimensional materials in materials science
which is primarily comprised of transition metal carbides
nitrides
or carbon-nitrides.Due to the presence of hydroxyl and oxygen-containing groups on its surface
MXene possesses the metal conductivity of transition metal carbides and a low band gap
providing abundant active sites for gas adsorption and surface reactions.These remarkable attributes have propelled MXene into the forefront of research in new materials in recent years.MXene in terms of its preparation method
gas sensing mechanism and application in the field of gas sensing is reviewed.Ultimately
opportunities
challenges
and future development direction of MXene in the field of gas sensing are summarized and prospected.