Abstract
Development of efficient, economical and stable photocatalysts that can maximize the utilization of ultraviolet (UV), visible (Vis) and near-infrared (NIR) light for photocatalytic H2 evolution remains a challenge. Herein, polyhedral Mn0.2Cd0.8S (MCS) modified with amorphous NiB nanoparticles was rationally constructed by in-situ synthesis method. Compared to MCS, the optimized MCS/NiB composite exhibited much superior activity with the H2 evolution rate of 21.6, 29.1, 35.4 and 45.6 mmol g–1 h–1 under Vis (420–780 nm), Vis-NIR (420–1100 nm), UV-Vis (350–780 nm) and UV-Vis-NIR (300–1100 nm) light irradiation, respectively. The enhanced activity was attributed firstly to high charge carrier separation efficiency and adequate active reaction sites due to the modification of NiB co-catalyst and secondly to the enhanced photothermal effect owing to the introduction of full spectrum-responsive NiB. This work provides a new perspective for designing photothermal effect-enhanced photocatalytic system.
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