Many researchers have shown that CO2 can be reduced
in water vapor or solvent by photocatalysts such
as TiO2 and ZnS [2,3]. From a thermodynamic perspective,
transforming 1 mol of CO2 into methanol requires
228 kJ. Six electrons are required to covert the
C4+ of CO2 to the C2− of methanol. Eq. (1) describes
the overall reaction.
energy efficiencies are proposed and presented for the
photoactivity of our system.