Sulfur mediated graphitic carbon nitride/S-Se-graphene as a metal-free hybrid photocatalyst for pollutant degradation and water splitting

摘要: Abstract Development of metal-free catalysts is huge interest for photocatalytic water splitting using solar energy. Here, we report a composite nano-material consisting sulfur-incorporated graphitic carbon nitride grown on the surface sulfur/selenium co-doped graphene (CNS:S-Se-Gr) hybrid as high-performance photocatalyst degradation methylene blue (MB) and hydrogen evolution (by splitting) in presence sacrificial donors under visible light illumination. The recorded MB efficiency about 98% 3.5 h. achieved highest rates CNS:S-Se-Gr sodium sulfite lactic acid solution are 1.58 2.59 mmol g−1 h−1 respectively. This material exhibits significantly enhanced H2 activity (9-fold) compared with that pristine g-C3N4. Also, proposed possible mechanism charge separation transfer catalyst. Additionally, modulation electronic band structure has been investigated. These results suggest great potential promising splitting.