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Construction of ternary CdxMo1−xSe quantum dots for enhanced photocatalytic hydrogen production

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Abstract

The development of novel photocatalyst is an important issue for improving the photocatalytic hydrogen production efficiency. Herein, novel aqueous ternary CdxMo1−xSe quantum dots (QDs) are prepared with five ratios (x = 0, 0.5, 0.67, 0.75, 1) by modulating the metal content. Experimental results show that the doping of Mo promotes the photoinduced electrons transfer and decreases the photoinduced electron–hole pairs recombination. Compared with the CdSe QDs, Cd0.75Mo0.25Se QDs, Cd0.5Mo0.5Se QDs and MoSe2 QDs, Cd0.67Mo0.33Se QDs exhibit significantly enhanced photocatalytic activity, and the amount of H2 production comes up to 911.1 μmol in 7 h. Meanwhile, the Cd0.67Mo0.33Se QDs display substantially high stability in recycling test, which facilitates the utilization of ternary QDs in the photocatalytic hydrogen production application.

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Acknowledgements

The work was supported by National Natural Science Foundation of China [Grant Numbers 51772162, 51703112], the Taishan Scholars program, China, Postdoctoral Science Foundation [Grant Number 2017M622152], Natural Science Foundation of Shandong Province, China [Grant Number ZR2017BEM040], Talent Fund of Shandong Collaborative Innovation Center of Eco-Chemical Engineering [Grant Number XTCXQN18], Talent Development Fund Project of Jilin Province.

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Authors and Affiliations

  1. Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People’s Republic of China

    Jishu Han, Ying Liu, Ying Wang & Lei Wang

  2. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, People’s Republic of China

    Ruiyang Zhao

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  1. Jishu Han
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  2. Ying Liu
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Han, J., Liu, Y., Wang, Y. et al. Construction of ternary CdxMo1−xSe quantum dots for enhanced photocatalytic hydrogen production. J Mater Sci 55, 1117–1125 (2020). https://doi.org/10.1007/s10853-019-04092-5

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