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Synthesis of TiO2/SiO2/Ag/Ag2O and TiO2/Ag/Ag2O nanocomposite spheres with photocatalytic performance

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Abstract

TiO2/SiO2/Ag/Ag2O and TiO2/Ag/Ag2O nanocomposite spheres have been synthesized via a low-temperature hydrothermal method using SiO2 spheres as templates, combined with a light-induced reduction method and a hydrogen peroxide oxidation process. Scanning electron microscopy, energy-dispersive X-ray and X-ray diffraction analyses have demonstrated that Ag and Ag2O nanoparticles were successfully deposited on the surfaces of TiO2/SiO2 nanocomposite spheres and porous TiO2 nanospheres forming nanoheterojunctions. The photocatalytic experiment results reveal that all the as-prepared catalysts possess improved photocatalytic activities compared with P25 nanoparticles. Both TiO2/SiO2/Ag/Ag2O and TiO2/Ag/Ag2O nanocomposite spheres exhibit excellent photocatalytic performances, which can be attributed to the synergistic effects of different kinds of nanoparticles. The synergistic mechanism of these nanoparticles is also discussed in detail.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 61774070), the Natural Science Foundation of Jiangsu Province (Grant No. BK20161300), the Six Talent Peaks Project in Jiangsu Province (Grant No. XNY-008), and also sponsored by Qing Lan Project and 333 Project of Jiangsu Province.

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Authors and Affiliations

  1. Faculty of Mechanical and Material Engineering, Huaiyin Institute of Technology, Huaian, 223003, People’s Republic of China

    Anquan Deng & Yufu Zhu

  2. College of Material Science and Engineering, Nanjing Tech University, Nanjing, 21009, People’s Republic of China

    Anquan Deng

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  1. Anquan Deng
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  2. Yufu Zhu
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Correspondence to Yufu Zhu.

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Deng, A., Zhu, Y. Synthesis of TiO2/SiO2/Ag/Ag2O and TiO2/Ag/Ag2O nanocomposite spheres with photocatalytic performance. Res Chem Intermed 44, 4227–4243 (2018). https://doi.org/10.1007/s11164-018-3365-5

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