“…Two-dimensional (2D) materials, including graphene, black phosphorus (BP), transition metal dichalcogenides (TMDs), layered double hydroxides (LDHs), transition metal carbides and nitrides (MXenes) have attracted extensive attention of the scientific community for their unique chemical and physical property [1] , [2] , [3] , [4] , [5] , [6] , [7] . Among these 2D materials, MXenes have aroused huge research upsurge in terms of the synthesis and application since its first discovery in 2011 by Yury Gogotsi [8] , [9] , [10] , [11] . In general, MXenes are prepared from its layered ternary MAX phase by selective etching the A elements (group III or IV), and the obtained products were denoted as M n+1 X n T x , where M represents Ti, V, Nb, and Mo, x represents C and/or N, n = 1, 2, or 3, and T x stands for the surface functional group (OH, O, and/or F) [12] .…”