Facile in situ hydrothermal synthesis of g-C3N4/SnS2 composites with excellent visible-light photocatalytic activity

The g-C 3 N 4 /SnS 2 composites were prepared by in situ hydrothermal method , and the effect of g-C 3 N 4 content on the physical and chemical properties, and photocatalytic performance of g-C 3 N 4 /SnS 2 composites was investigated. The introduction of g-C 3 N 4 enhanced the visible-light absorption of SnS 2 , and reduced the recombination rate of electron-hole pairs. The photocatalytic performance of g-C 3 N 4 /SnS 2 composites was also obviously influenced by g-C 3 N 4 content, and it was found that 15% g-C 3 N 4 /SnS 2 composite exhibited the highest photocatalytic activity and excellent regeneration, which was attributed to the most efficient charge separation, the largest specific surface area and the formation of dominant active species (h + and O 2 − radicals) during the photocatalytic process.