Sb doped SnO2-decorated porous g-C3N4 nanosheet heterostructures with enhanced photocatalytic activities under visible light irradiation

- A novel oxidized porous g-C3N4 nanosheets/Sb doped SnO2 particles heterojunction composite is constructed.
- The composite shows much higher photocatalytic CO2 reduction activities than each monocomponent under visible light.
- The composite shows much higher photocatalytic IPA oxidation activities than each monocomponent under visible light.
- Oxidized porous g-C3N4 nanosheets and Sb doped SnO2 particles heterojunction has been constructed in this composite.
- Introduction of heterojunction constructed in this composite plays a key role in the enhanced photocatalysis.

A novel Sb doped SnO2 decorated porous g-C3N4 nanosheet composite photocatalyst, which can be applied in photocatalytic reactions for CO2 reduction and gaseous iso-isopropanol (IPA) oxidation under visible light irradiation, is designed and synthesized. Results demonstrate that the intimate interfacial contact and heterojunction interaction between g-C3N4 and Sb doped SnO2 can significantly boost the photocatalytic efficiencies compared with individual g-C3N4 and Sb doped SnO2 due to the effective separation of photo-generated charge carriers.

161