Photocatalytic water splitting for hydrogen production using solar energy is a promising sustainable energy solution. However, slow kinetics hinder activity. Researchers synthesized high-crystallinity nitrogen-rich carbon nitride nanosheet photocatalysts via a novel method, enhancing photocatalytic hydrogen evolution. The study, published in Advanced Powder Materials, showcased the exceptional performance of HC-C3N5 nanosheets, demonstrating a hydrogen evolution rate exceeding bulk C3N5. The research emphasized the importance of bound-state electrons in broadening the absorption spectrum and enhancing charge separation for efficient hydrogen production. By integrating electron traps and reactive centers, the nanosheets exhibited macroscopic photoinduced color changes, effectively improving exciton generation. The discovery of potential electron capture sites further contributed to understanding complex reaction kinetics, strengthening charge separation dynamics. This innovative approach sheds light on developing efficient photocatalysts for sustainable hydrogen production.