Abstract
The conversion of CO2 into useful chemical fuels through solar photocatalysis is an important means to alleviate energy and environmental problems. In this work, small-sized Cu nanodots were dispersed on the surface of bismuth molybdate containing oxygen vacancies. The Cu/ILs/OVs-BMO composite photocatalyst with high photocatalytic reduction activity was obtained. The small size of Cu nanodots can not only greatly improve the visible light absorption of the composite catalyst, but also establish an effective channel for charge transport through the close interaction between Cu nanodots and bismuth molybdate, which promotes the efficient separation of photogenerated charge carriers and increases the photocurrent by 11.04 times. The CO2 photocatalytic reduction interface reaction was improved by adding an amine-based functionalized ionic liquid. The complexation of ILs and CO2 decreased the activation energy of generating CO2 intermediate and the overpotential of the reaction. Compared with BMO, the yield of the liquid products on Cu/ILs/OVs-BMO photocatalyst increased by 17.80 times.
Published Version
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