Enhanced H₂evolution performance by carbonized SiC/g-C₃N₄heterojunction under visible-light illumination

In this study, carbonized silicon carbide/graphitic carbon nitride ((SiC/C)/g-C₃N₄) composites were fabricated via a facile calcination method. The optimal SiC/C/g-C₃N₄composite shows an excellent visible-light photocatalytic activity for water splitting, with the highest hydrogen evolution amount being 200.2μmol, which is four times higher than that of pure g-C₃N₄when triethanolamine and platinum (1.0 wt%) are used as the sacrificial agent and cocatalyst, respectively. With an intimate interface between SiC/C and g-C₃N₄, the energy band structure of g-C₃N₄was well engineered for photocatalytic H₂production. This study provides a novel method for fabricating g-C₃N₄-based heterojunctions for application in environmental conservation.