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Enhanced visible-light photocatalytic activity of Ag/In2S3 photocatalysts induced by Schottky contact and SPR of Ag

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Abstract

In this work, a highly photocatalytic Ag/In2S3 was synthesized via the hydrothermal and photoreduction method. The as-prepared photocatalysts were confirmed by XRD, SEM, HRTEM, and XPS showing that Ag nanoparticles were decorated on the In2S3 surface. Photocatalytic activities of photocatalysts were investigated for photodegradation of methyl orange (MO) under visible light. The Ag/In2S3 composites showed the enhanced photocatalytic efficiency of 97% under visible light irradiation for 90 min, which was about 3.0 times higher than that of pure In2S3. The enhanced photocatalytic performance could be owing to the SPR of Ag and the Schottky junction formed between Ag and In2S3. Our PL results indicate the inhibited recombination of the photogenerated electron–hole pairs in In2S3 upon the attachment of Ag nanoparticles. The active species tests demonstrate that the superoxide radical (·O2−) and h+ are responsible for the efficient degradation of MO over Ag/In2S3. In addition, it also proposes a potential mechanism for enhancing the photocatalytic activity.

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Acknowledgements

We gratefully acknowledge the financial support of National Natural Science Foundation of China (No. 51772178, 21701107), the Platform construction Fund for Imported talent of Shaanxi University of Science and Technology (134080038), the Doctoral Scientific Research Startup Foundation of Shaanxi University of Science and Technology (2016QNBT-07), and the Serve Local Special Projects of Shaanxi Provincial Department of Education (NO. 17JF004).

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  1. Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science and Engineering, Shaanxi University of Science & Technology, Xi’an, 710021, Shaanxi, People’s Republic of China

    Lixiong Yin, Haofan Zhang, Jianfeng Huang, Xingang Kong, Huimin Li, Peijie Bai & Jiaqi Song

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  1. Lixiong Yin
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  2. Haofan Zhang
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Yin, L., Zhang, H., Huang, J. et al. Enhanced visible-light photocatalytic activity of Ag/In2S3 photocatalysts induced by Schottky contact and SPR of Ag. J Mater Sci: Mater Electron 31, 2089–2099 (2020). https://doi.org/10.1007/s10854-019-02730-x

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