Direct Z-scheme In2O3/Bi2MoO6 heterojunction: Efficient photocatalyst for CO2 reduction

For ultimate photocatalytic CO 2 reduction efficiency, In 2 O 3 synthesized via co-precipitation/calcination was architecturally integrated with Bi 2 MoO 6 through solvothermal assembly, constructing composite catalysts. In 2 O 3 incorporation triggered absorption edge red-shifting, quenched photoluminescence, and amplified photocurrent density. The 2 %-In 2 O 3 composite delivered 12.5 μmol/g/h CO yield under 300W xenon lamp – achieving a 2.5-fold enhancement versus pure In 2 O 3 and a 1.8-fold gain relative to pure Bi 2 MoO 6 . This superiority arose from heterostructuring induced by In 2 O 3 loading, which expedited photogenerated carrier mobility and elevated CO 2 conversion activity.