Composites of MoS2 Nanosheets and Graphitic Carbon Nitride Nanosheets for Photocatalytic Mercury Removal

In this study, a type of nano-photocatalyst of MoS2/g-C3N4 with a 2D/2D heterostructure was successfully developed using the impregnation-calcination method. The developed composite catalyst exhibited enhanced photocatalytic activity and stability in the removal of Rhodamine B (RhB) and vaporous Hg-0 under the irradiation of visible light. The introduced MoS2 nanosheets could serve as a platform for the dispersion of g-C3N4 nanosheets, which was conducive to the exposure of more active sites. In addition, the MoS2 nanosheets also facilitated the capacity for absorption of optical light and separation of the photogenerated electron from the hole, leading to the promotion of photocatalytic efficiency.