Abstract
Polymeric carbon nitrides are limited by low electron mobility induced by hydrogen bonding between strands of polymeric melon units with NH/NH2 groups. In our work, an amorphous carbon nitride photocatalyst with rich three coordinate nitrogen (N3c) vacancy sites was prepared through an in-situ hydrogen bond breaking approach. The generation of a dense hydrogen bonding network and the disruption of the long-range atomic order to the carbon nitride layers provide for the selective production of the defective activity center. Compared to bulk carbon nitrides, the removal efficiency of tetracycline hydrochloride (TC-H) got a significant boost due to the excellent contaminant adsorption activity from nitrogen vacancy. Besides, it showed a triple lift of H2 production through releasing the coordination between amine and Pt occupied by hydrogen bonding. This work uses changes in hydrogen bonding content to regulate the active center of catalytic reactions, providing additional ideas for the study of defect engineering.
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