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Study on preparation and visible-light activity of Ag–TiO2 supported by artificial zeolite

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Abstract

The material of Ag–TiO2 supported by artificial zeolite (Ag–TiO2/Z) was synthesized by the sol–gel method. Tetrabutyl titanate was used as the precursor, AgNO3 as the Ag source, and artificial zeolite as a carrier. The samples were analyzed by XRD, SEM, EDS, XPS, UV–Vis DRS and N2 adsorption–desorption isotherms. The results indicated that Ag–TiO2/Z had an anatase crystal phase, the dopant Ag was in the form of Ag0 and Ag2O nanocrystalline, and the existence of Ag2O can introduce impurity level and reduce the band gap of TiO2, which can lead to the absorption spectrum of the sample shift into the region of visible light, with 2.75 eV band gap energy. In addition, the photocatalytic properties of the samples were investigated by the degradation of methylene blue (MB) under visible light irradiation. The degradation rate of 3 at% Ag–TiO2/Z reached 93% within 90 min, which exhibited the best photocatalytic activity among all the samples. Meanwhile, with reused photocatalyst, the stability of 3 at% Ag–TiO2/Z was evaluated by the degradation of MB, whose efficiency stayed at around 89% after 5 times degradation. This study will be conducive to the development of visible-light activity of TiO2 and the application of aqueous pollutants.

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Acknowledgements

Financial support of this research work was provided by major National Science and Technology Special Projects (No. 2016ZX02301003-004-007), the Key Project of Natural Science of Hebei Province Colleges and Universities (No. ZD2016123) and the Key Laboratory of Electronic Materials and Devices of Tianjin, China.

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Authors and Affiliations

  1. Key Laboratory of Electronic Materials and Devices of Tianjin, School of Electronic and Information Engineering, Hebei University of Technology, Tianjin, 300130, People’s Republic of China

    Caixuan Sun, Guofeng Pan, Yuxin Miao, Tian Zhang & Li Zhang

  2. School of Computer Science and Software, Hebei University of Technology, Tianjin, 300401, People’s Republic of China

    Ping He

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  1. Caixuan Sun
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  2. Ping He
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  3. Guofeng Pan
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  4. Yuxin Miao
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Correspondence to Guofeng Pan.

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Sun, C., He, P., Pan, G. et al. Study on preparation and visible-light activity of Ag–TiO2 supported by artificial zeolite. Res Chem Intermed 44, 2607–2620 (2018). https://doi.org/10.1007/s11164-017-3249-0

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  • DOI: https://doi.org/10.1007/s11164-017-3249-0

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