Abstract
The composites of CdS@g-C3N4/Ni(OH)2 was prepared by photo-deposition method. The co-catalyst Ni2+/Ni clusters reduced from Ni(OH)2 can provide active sites on the surface of CdS@g-C3N4, which significantly accelerate the separation of electron–hole pairs though the special channel formed between CdS and g-C3N4. This way further improved the H2 production activity for 1445.5 µmol, which was 39.5 times and 149.0 times then pure CdS and g-C3N4, respectively. The AQE corresponding to the produced H2 was 5.59%. The morphology, crystal structure and chemical valence of the elements were characterized by SEM, HRTEM, XRD, XPS, UV–Vis, etc. The photoelectrochemical properties of CdS@g-C3N4/Ni(OH)2 was measured by steady-state fluorescence and electrochemical. The results show that composite catalyst posses a high photoelectric density and well light absorption properties. the purpose of high H2 production and fleet charges separation is achieved. Simultaneously, the reaction of H2 production mechanism was proposed under the condition of lactic acid solution as a sacrificial reagent.
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Acknowledgements
This work was financially supported by the Chinese National Natural Science Foundation (21862002 and 41663012), the Graduate student innovation project of North Minzu University (YCX18076), the project of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, the new technology and system for clean energy catalytic production, Major scientific project of North Minzu University (ZDZX201803), the key scientific research projects of North Minzu University (No. 2017KJ16) and the Laboratory for the development and application of electrochemical energy conversion technology, North Minzu University and the Ningxia low-grade resource high value utilization and environmental chemical integration technology innovation team project of North Minzu University.
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YZ and ZJ conceived and designed the experiments; YZ, XY, and GW performed the experiments; ZJ and HW contributed reagents/materials and analysis tools; YZ wrote the paper.
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Zhang, Y., Jin, Z., Yan, X. et al. Effect of Ni(OH)2 on CdS@g-C3N4 Composite for Efficient Photocatalytic Hydrogen Production. Catal Lett 149, 1174–1185 (2019). https://doi.org/10.1007/s10562-019-02708-8
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DOI: https://doi.org/10.1007/s10562-019-02708-8