“…in 2011 reported 2D MXene nanosheets based on transition metal carbide and nitride materials. [ 21 ] These materials have been extensively studied for numerous applications that include sensors, [ 22 , 23 , 24 ] light‐emitting diodes, [ 25 , 26 , 27 ] energy storage, [ 28 , 29 , 30 , 31 , 32 , 33 , 34 ] water purification, [ 35 , 36 , 37 , 38 ] supercapacitors, [ 39 , 40 , 41 , 42 ] photocatalysis, [ 43 , 44 , 45 , 46 ] biomedical, [ 47 , 48 , 49 , 50 , 51 , 52 ] and electromagnetic [ 52 , 53 , 54 , 55 ] applications. MXenes are a unique and unusual combination of early transition metal carbide/nitrides or carbonitrides that are typically synthesized by a top–down selective etching procedure of their parent hexagonal MAX phases.…”