Boosted charge transfer and photocatalytic CO2 reduction over sulfur-doped C3N4 porous nanosheets with embedded SnS2-SnO2 nanojunctions

Two-dimensional porous nanosheet heterostructure materials, which combine the advantages of both architecture and components, are expected to feature a significant photocatalytic performance toward CO2 conversion into useful fuels. Herein, we provide facile strategy for fabricating sulfur-doped C3N4 nanosheets with embedded SnO2-SnS2 nanojunctions (S-C3N4/SnO2-SnS2) via liquid impregnation-pyrolysis subsequent sulfidation treatment using layered supramolecular structure as precursor C3N4. A hexagonal was first prepared Then Sn4+ ions were intercalated interlayers through impregnation method. The annealing in air simultaneously realized fabrication efficient exfoliation nanosheets. Moreover, SnO2 nanoparticles formed situ In following process under nitrogen atmosphere, sulfur powder can react form nanojunctions. As expected, ternary construction could be achieved this work. Sulfur-doped featured abundant active sites, enhanced visible light absorption, interfacial charge transfer. optimized S-C3N4/SnO2-SnS2 much higher gas-phase reduction high yields CO (21.68 μmolg−1 h−1) CH4 (22.09 compared control C3N4, C3N4/SnO2, S-C3N4/SnS2 photocatalysts. selectivity reached 80.30%. Such promising synthetic inspire design other robust C3N4-based heterostructures broad range applications.