“…Recently, various methods such as hydrothermal, sol–gel, spray pyrolysis, thermal evaporation, chemical bath deposition, and templated processes have been applied to the preparation of molybdenum oxides (mainly MoO 3 ) [ 19 , 20 , 21 , 22 , 23 , 24 ]. Furthermore, the conventional CVD processes of MoO 3 have been reported [ 25 , 26 , 27 , 28 ].…”