Preparation of S-C 3 N 4 /AgCdS Z-Scheme Heterojunction Photocatalyst and Its Effectively Improved Photocatalytic Performance.

In this study, S-doped graphitic carbon nitride (S-C 3 N 4 ) was prepared using the high-temperature polymerization method, and then S-C 3 N 4 /AgCdS heterojunction photocatalyst was obtained using the chemical deposition method through loading Ag-doped CdS nanoparticles (AgCdS NPs) on the surface of S-C 3 N 4 . Experimental results show that the AgCdS NPs were evenly dispersed on the surface of S-C 3 N 4 , indicating that a good heterojunction structure was formed. Compared to S-C 3 N 4 , CdS, AgCdS and S-C 3 N 4 /CdS, the photocatalytic performance of S-C 3 N 4 /AgCdS has been significantly improved, and exhibits excellent photocatalytic degradation performance of Rhodamine B and methyl orange. The doping of Ag in collaboration with the construction of a Z-scheme heterojunction system promoted the effective separation and transport of the photogenerated carriers in S-C 3 N 4 /AgCdS, significantly accelerated its photocatalytic reaction process, and thus improved its photocatalytic performance.