Different Morphologies of SnS2 Supported on 2D g-C3N4 for Excellent and Stable Visible Light Photocatalytic Hydrogen Generation

Highly efficient different morphologies of SnS2 (nanoparticles, nanosheets, and 3D flower-like)/g-C3N4 composites were, respectively, prepared via an elementary hydrothermal method that was integrated with the calcination means. The XRD results showed that the relative intensities of several diffraction peaks, especially (001), (100), (101), and (102), indicated that the as-prepared samples (SnS2 nanoparticle, SnS2 nanosheet, and 3D flower-like SnS2) should be dominated by different specific preferred growth of facets. In comparison with SnS2 and pure g-C3N4, the SnS2/g-C3N4 composites exhibited much higher H-2 development performance under visible light irradiation in the presence of Na2SO3 and Na2S as the sacrificial agent. The SnS2 nanoparticles/g-C3N4 composites exhibit the highest visible-light-driven H-2-generation rate of 6305.18 mu mol h(-1) g(-1) without any noble metal as cocatalyst, which is approximately 16.98 times higher than that of SnS2 nanoparticles. In all, the SnS2 nanoparticles (SnS2 nanoparticle/g-C3N4 composite) dominated by (001) and (100) preferred growth of facets exhibit significant photocatalytic activity resulting from their suitable band edges to realize the photocatalytic redox reaction. The analysis of photocurrent response, linear sweep voltammograms, and photoluminescence demonstrated that the low recombination rate and the efficacious charge transfer of photogenerated carriers could be assigned to the interactive impact of g-C3N4 and SnS2.