Synthesizing the High Surface Area g-C3N4 for Greatly Enhanced Hydrogen Production

Adjusting the structure of g-C3N4 to significantly enhance its photocatalytic activity has attracted considerable attention. Herein, a novel, sponge-like with porous is prepared from annealing protonated melamine under N2/H2 atmosphere (PH-CN). Compared bulk via calcination ambient (B-CN), PH-CN displays thinner nanosheets and higher surface area (150.1 m2/g), which benefit for shortening diffusion distance photoinduced carriers, providing more active sites, finally favoring enhancement activity. Moreover, it can be clearly observed UV-vis spectrum that better performance harvesting light compared B-CN. Additionally, larger band gap 2.88 eV Fermi level conduction potential increased valence decreased, could promote water redox reaction. The application experiment results show hydrogen evolution rate on was nearly 10 times than B-CN, roughly 4104 μmol h−1 g−1. method shown in this work provides an effective approach adjust