Abstract
Constructing of homojunction of sulfides would be an effective method to improve photocatalytic hydrogen evolution activity. However, only pure hexagonal phase Mn0.25Cd0.75S was synthesized so far. Herein, a series of cubic/hexagonal Mn0.25Cd0.75S (CH-MCS) photocatalysts were hydrothermally synthesized by controlling the amount of thioacetamide. When the molar ratio of Mn:Cd:S equals to 1:3:6, the CH-MCS exhibited the maximum H2 production rate of 5.85 mmol g−1 h−1. Moreover, the optimized CH-MCS modified with 10 wt% LaCoO3 reached the maximal rate of H2 evolution to 14.5 mmol g−1 h−1, that is 5.5 folds to pure hexagonal Mn0.25Cd0.75S and 2.5 folds to the optimized CH-MCS, which can be attributed to the cubic/hexagonal crystal phase homojunctions and the enhancement of visible-light absorptions caused by the decoration of LaCoO3.
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Acknowledgements
The authors thank the National Natural Science Foundation of China (22062026). The authors also thank The Yunling Scholar (K264202012420), the Industrialization Cultivation Project (2016CYH04), the Key Projects for Research and Development of Yunnan Province (2018BA065), Key Laboratory of Advanced Materials for Wastewater Treatment of Kunming for financial support, the authors also thank the Advanced Analysis and Measurement Center of Yunnan University for the sample testing service.
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Yang, P., Yang, Y., Jiang, L. et al. Significantly Enhanced Photocatalytic Hydrogen Evolution Under Visible Light Over LaCoO3-Decorated Cubic/Hexagonal Mn0.25Cd0.75S. Catal Lett 152, 659–668 (2022). https://doi.org/10.1007/s10562-021-03660-2
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DOI: https://doi.org/10.1007/s10562-021-03660-2