Graphite carbon nitride doped with a benzene ring for enhanced photocatalytic H evolution.

Graphitic carbon nitride (g-CN) has been identified as a promising material for photocatalytic hydrogen (H) production, but it shows a low activity. Herein, g-CN doped with a benzene ring (B-CN) was synthesized via a simple thermal polycondensation method, exhibits 5.4 times higher H evolution rate than the pristine one, and achieves a high apparent quantum yield of 4.