Au/g-C3N4 heterostructure sensitized by black phosphorus for full solar spectrum waste-to-hydrogen conversion

Photocatalytic water splitting with simultaneous degradation of organic pollutants is an effective strategy to alleviate the increasingly serious energy and environmental crisis. However, photocatalytic activity restricted by high charge recombination rate limited sunlight utilization. Herein, black phosphorus (BP) a broad response range was utilized as photosensitizer enhance performance Au/carbon nitride (CN) heterostructure. The as-prepared BP/Au/CN exhibited significantly enhanced H2 generation 1400.8 µmol h?1 g?1 under UV-vis light irradiation, which almost 70 times higher than that bare CN BP/CN 2 folds Au/CN heterojunction. Specifically, optimal sample presented waste-to-hydrogen production 195.8 bisphenol A, verifying synergistic effect ternary mechanism systematically studied combination experiments theoretical calculations. improved derived from overall absorption ability BP, electron transfer media plasmonic character Au nanoparticles, well matched work function strong interaction three components. A unidirectional BP then established, effectively capability, resulting appropriate Ohmic contact Schottky barrier constructed in hybrid.