Photocatalytic conversion of water, carbon dioxide, oxygen to useful chemicals is a promising solar conversion technology since it needs only semiconductor materials and light to carry out the catalytic reactions. The photocatalytic production of H2O2 through dioxygen reduction has been receiving great attentions recently since it is an eco-friendly oxidant and fuel that generates water and dioxygen only as the reaction products. However, the low conversion efficiency hinders its practical application and expensive noble metals are usually needed as cocatalytic material. Here we report some strategies to efficiently increase the photocatalytic production of H2O2 through the selective electron transfer to dioxygen. Reduced graphene oxide/titania composites (rGO/TiO2), graphene oxide nanodisks (GONDs) attached to CdS-silica nanocapsules (SNCs) (GOND/CdS–SNC), graphitic carbon nitride modified with multi-component doping were prepared, characterized, and tested for their photoactivities of H2O2 production. The present photocatalytic systems consisting of earth-abundant elements only make the production of H2O2 more viable.

Photocatalytic production of H2O2 through selective two-electron reduction of O2

2019 Spring National Meeting

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