Two-Dimensional Transition Metal carbides, nitrides or carbon nitrides, namely MXenes, are a new type of two-dimensional structural materials jointly discovered by Professor Yury Gogotsi and Professor Michel W. Barsoum and others from Drexel University in 2011.
Its chemical general formula can be expressed by Mn+1XnTz, where M refers to transition metals (such as Ti, Zr, Hf, V, Nb, Ta, Cr, Sc, etc.), X refers to C or/and N, N is generally 1-3, Tz refers to surface groups (such as O2-, OH-, F-, NH3, NH4+, etc.). MXenes are obtained mainly by extracting weakly bound A-site elements, such as Al atoms, from the MAX phase in HF acid or A mixture of hydrochloric acid and fluoride. It has the characteristics of high surface area, high electrical conductivity, flexible composition, controllable minimum nanolayer thickness and other advantages of graphene, has shown great potential in energy storage, adsorption, sensors, conductive filler and other fields.
Two-dimensional Transition Metal carbide nanosheets obtained from ternary layered Max Phase Ceramic Materials stripped of A-layer atoms, accordion-like structure
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