Graphitic carbon nitride-supported Bi Spheres are used in the study of photocatalytic reduction of carbon dioxide

Abstract In recent years, research on photocatalytic reduction of carbon dioxide has aroused widespread heated discussions, combined with the current theme of energy conservation and emission reduction. Photo-reduction of carbon dioxide is considered to be an important technology with promising applications. At present, photo-reduced carbon dioxide is mainly limited by the difficulty of absorbing visible light and the short lifetime of photogenerated carriers. Therefore, we designed and synthesized bismuth ball-supported g-C 3 N 4 . Bismuth is a non-precious metal but at the same time has SPR (Surface Plasmon Resonance) of precious metals. The SPR effect was used to increase the absorption of visible light and extend the lifetime of photogenerated carriers at different loads. CN-Bi0.7 exhibited a superior photocatalytic CO2 reduction activity with the CO evolution of 8.2805 μmol·g −1 ·h −1 , which is 4-fold times higher than that of g-C 3 N 4 .The enhanced photocatalytic CO 2 conversion efficiency can be attributed to the SPR of Bi spheres and enhanced by the synergetic effects of g-C 3 N 4 .