Abstract
0D/2D Pt-C3N4/CdS heterojunction photocatalyst were fabricated with CdS quantum dots interspersed on g-C3N4 nanosheets via successive ionic layer absorption process. The obtained Pt-C3N4/CdS Z-scheme heterojunction with Pt cocatalyst deposited on g-C3N4 nanosheets exhibited H2 production rate of 35.3 mmol g−1 h−1, which is 3.1 times higher than that of Pt-CdS/C3N4. The enhanced photocatalytic activity are attributed to the Z-scheme charge carrier transfer mechanism with stronger redox ability. The photocatalytic mechanism of the CdS/g-C3N4 composite is investigated and demonstrated in this work. It may provide unique insights to design 0D/2D Z-scheme heterojunction photocatalyst systems using a facile method for highly efficient H2 production.
Graphic Abstract
Schematic illustration of charge transfer modulated by the metal cocatalyst selective deposition on heterojunction-type II (a) and direct Z-Scheme mechanisms (b) over the C3N4/CdS heterostructure composites under visible light irradiation.
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Acknowledgements
We acknowledge the financial support from National Natural Science Foundation of China (No. U1932128, 21505091 and U1510108), Natural Science Foundation and Post-doctoral Program of Henan Province(No. 202300410305 and 19030022), Youth Backbone Teachers Project of Henan Colleges and Universities (2018GGJS133) and Key Laboratory of Low-Carbon Conversion Science & Engineering, Shanghai Advanced Research Institute, Chinese Academy of Sciences.
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Wang, J., Yu, L., Wang, Z. et al. Constructing 0D/2D Z-Scheme Heterojunction of CdS/g-C3N4 with Enhanced Photocatalytic Activity for H2 Evolution. Catal Lett 151, 3550–3561 (2021). https://doi.org/10.1007/s10562-021-03579-8
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DOI: https://doi.org/10.1007/s10562-021-03579-8