“…For having higher photocatalytic performance, the semiconductor catalyst must have an optimum bandgap, optimum energy positions, and chemical as well as biologically stable nature. 14–20 Over the last two-three decades, the use of nanostructured semiconductor materials especially TiO 2 , ZnO, SnO 2 , ZnS, SnS 2 , MoS 2 , CdS, CeO 2 , Ta 2 O 5 , Nb 2 O 5 , SrTiO 3 , etc. has been used as a potential photocatalyst.…”