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Synthesis and visible-light photocatalytic properties of BiOBr/CdS nanomaterials

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Abstract

The visible-light-responsive composite photocatalyst is beneficial to improve the solar energy utilization efficiency through the coupling of narrow bandgap materials. In this work, CdS nanowires were prepared by hydrothermal method, and then BiOBr/CdS composite materials with different mass ratios were successfully prepared by a simple two-step sonography-precipitation method using CdS nanowires as a deposition template. The photocatalysts were characterized by XRD, SEM, XPS, TEM, and other methods. Rhodamine B (RhB) was used as a model pollutant to evaluate the photocatalytic activity of BiOBr/CdS catalysts with different mass ratios. The photocatalytic test results show that the composite photocatalyst containing 60% BiOBr has the highest photocatalytic activity, which indicates that it is related to the decrease in photogenerated charge recombination rate. Subsequently, the electrochemical and physical methods were used to illustrate the electron transfer mechanism and the main active center of the as-prepared samples. Free radical capture experiments reveal that holes are the main active species in the photocatalytic process of composite samples.

Graphical abstract

BiOBr/CdS composite photocatalyst was prepared by a simple precipitation method using dispersed one-dimensional CdS nanowires as a template. BiOBr/CdS heterostructure combined adsorption and catalysis to degrade RhB molecules more efficiently. Free radical trapping experiments reveal that holes are the main active species in the photocatalytic process of composite samples.

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Acknowledgements

This work was financially supported by the LiaoNing Revitalization Talents Program (No. XLYC1907031), the Program for Liaoning Innovative Talents in University (No. LCR2018016), the Liaoning Provincial Natural Science Foundation of China (No. 2019-MS-244), and the Liaoning BaiQianWan Talents Program(No.2020921082), the National Natural Science Foundation of China (Grant Nos. 51704064, 51971058), the Fundamental Research Funds for the Central Universities (Grant N182312007, N2023001).

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Authors and Affiliations

  1. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China

    Junhua You, Lu Wang & Wanting Bao

  2. School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, People’s Republic of China

    Aiguo Yan & Rui Guo

  3. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao, 066004, People’s Republic of China

    Rui Guo

  4. Key Laboratory of Nano-Materials and Photoelectric Catalysis of Qinhuangdao, Qinhuangdao, 066004, People’s Republic of China

    Rui Guo

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  1. Junhua You
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Correspondence to Junhua You.

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You, J., Wang, L., Bao, W. et al. Synthesis and visible-light photocatalytic properties of BiOBr/CdS nanomaterials. J Mater Sci 56, 6732–6744 (2021). https://doi.org/10.1007/s10853-020-05721-0

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