Remarkably high apparent quantum yield of the overall photocatalytic H2O splitting achieved by utilizing Zn ion added Ga2O3 prepared using dilute CaCl2 solution

Abstract

Remarkably high photocatalytic activity for the overall H₂O splitting, where the activity was 32 mmol h⁻¹ for H₂ production and 16 mmol h⁻¹ for O₂ production under irradiation from a 450 W high-pressure Hg lamp and the apparent quantum yield (AQY) was 71% under irradiation at 254 nm, was achieved by utilizing a Rh_0.5Cr_1.5O₃(Rh; 0.5 wt%)/Zn(3 mol%)–Ga₂O₃ photocatalyst when Ga₂O₃ was prepared using dilute CaCl₂ aqueous solution having a concentration of 0.001 mol l⁻¹.