Facile strategy to construction Co2P/g-C3N4 heterojunction with excellent photocatalytic water splitting activity

Abstract The development of catalysts with excellent light harvest capacity and faster charge separation ability is required in order to improve the photocatalytic hydrogen evolution efficiency. In this work, Co2P/g-C3N4 was synthesized using red phosphorus as P sources by in-situ solvent-thermal method. The results showed that the best hydrogen evolution rate is 5916 μmol·g−1·h−1, which is about 39.4 times higher than that of pure g-C3N4. Furthermore, 1389 μmol·g−1·h−1 of the hydrogen evolution rate can be achieved under visible light. The excellent activity of the composite results from the Schottky junction effect and the enhanced surface reaction kinetics. This work reported a simple and effective photocatalyst about transition metal phosphides.