Synthesis and performance study of visible light responsive Mn-Sn3O4/g-C3N4 heterojunction photocatalyst

This study employed the hydrothermal method to dope Mn into Sn 3 O 4 , which was then combined with g-C 3 N 4 through calcination to prepare an II-type Mn-Sn 3 O 4 -x/CN composite photocatalyst. The impact of Mn-Sn 3 O 4 loading on the photocatalytic performance was discussed. The synthesized composite catalysts exhibited remarkable hydrogen production performance under visible light, with Mn-Sn 3 O 4 -10/CN demonstrating the highest performance. Characterization techniques confirmed the successful preparation of the catalysts, and the light absorption capacity, charge separation and transport efficiency of Mn-Sn 3 O 4 -10/CN are significantly improved compared to catalysts with other ratios. This study developed a Mn-Sn 3 O 4 -x/CN composite catalyst with high stability and good hydrogen production rate. It provides further directions for the research of g-C 3 N 4 -based composite catalysts.