Synthesis of MoS2/g-C3N4 nanosheets as 2D heterojunction photocatalysts with enhanced visible light activity

Abstract g-C 3 N 4 nanosheets coupled with MoS 2 nanosheets as 2D heteroconjuction were prepared via a facile impregnation and calcination method. The structure characterization clearly indicated that MoS 2 nanosheets were successfully horizontal loaded on g-C 3 N 4 nanosheets. The investigation indicated that the formation of 2D heterojunction between the g-C 3 N 4 nanosheets and MoS 2 nanosheets promoted the charge transfer and enhanced separation efficiency of photoinduced electron–hole pairs. Furthermore, the measurement of photocatalytic activity for the degradation of rhodamine B and methyl orange revealed that the as-prepared 2D MoS 2 /g-C 3 N 4 heterojunction exhibited the significantly enhanced photocatalytic activity and considerable stability under visible light irradiation. The 2D MoS 2 /g-C 3 N 4 heterojunction prepared with 3 wt% of MoS 2 exhibited the optimal photodegradable efficiency. The present work shows that the formation of 2D heterojunction should be a good strategy to design efficient photocatalysts.