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Synthesis of N-TiO2/BiOI/RGO composites with significantly enhanced visible light photocatalytic activity

  • Organic and Hybrid Functional Materials
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Abstract

In this work, four N-TiO2/bismuth oxyiodide (BiOI)/reduced graphene oxide (RGO) composite photocatalysts with different composite ratios were prepared using a hydrothermal method. The phase, surface structure, specific surface area, and light response were characterized by X-ray diffraction, X-ray photoelectron spectrum analysis, scanning electron microscopy, specific surface area and aperture analysis, and UV-vis diffuse reflection spectrum analysis. The results indicated that the N-TiO2/BiOI/RGO (NTGB) composite prepared with a mass ratio of 1:1:2 is a promising photocatalyst for the degradation of organic pollutants by using sunlight, with a specific surface area of 139.56 (m2/g), bandgap of 1.24 eV, and strong absorption with a smaller visible region.

It has the best photocatalytic properties under visible light irradiation in the degradation of methylene blue (MB): the degradation rate of MB in the presence of light for 60 min reached 99.22%, and its photocatalytic performance was significantly higher than that of TiO2, N-TiO2, BiOI, N-TiO2/BiOI, BiOI/RGO, NTGB1, NTGB2, and NTGB4.

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Acknowledgment

We acknowledge the financial support of the Heilongjiang natural fund project [Grant No. B2017012].

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Authors and Affiliations

  1. School of Environment and Chemical Engineering, Heilongjiang University of Science & Technology, Harbin, 150022, China

    Limei Xue & Fengzhi An

  2. Suzhou Lai School Education Technology Co. Ltd., Jiangsu, Suzhou, 215000, China

    Yanhao Yang

  3. State Grid Xinyuan Compant Ltd., Jilin, Dunhua, 133700, China

    Yuan Ma

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  1. Limei Xue
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  2. Fengzhi An
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  3. Yanhao Yang
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  4. Yuan Ma
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Correspondence to Limei Xue or Fengzhi An.

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Xue, L., An, F., Yang, Y. et al. Synthesis of N-TiO2/BiOI/RGO composites with significantly enhanced visible light photocatalytic activity. Journal of Materials Research 35, 153–161 (2020). https://doi.org/10.1557/jmr.2019.401

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  • DOI: https://doi.org/10.1557/jmr.2019.401

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