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I-doped Bi2WO6 microflowers enhanced visible light photocatalytic activity for organic pollution degradation and NO removal

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Abstract

Bi2WO6 is a widely used photocatalyst, which has a good visible light response owing to the narrow band gap. But in the process of photocatalytic reactions, the combination of electrons and holes has a significant effect on the photocatalytic activity. In this work, I-doped Bi2WO6 microflowers were prepared by a simple one-step hydrothermal method. The microflower has a large surface area, which can be conducive to the adsorption of pollutants, degrading Rhodamine B and removal of NO effectively. The structure, as well as optical properties of the I-doped Bi2WO6 microflowers have been characterized by a series of techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscope (TEM), and UV–vis diffuse reflectance spectroscopy. According to the results of UV–vis spectra, the I-doped Bi2WO6 microflowers are found demonstrating a significantly enhanced visible light absorption. The photocurrent and photoluminescence spectra indicate an increased separation rate for the I-doped Bi2WO6 photocatalyst of the photo-generated electron–hole pairs. Under visible-light irradiation, the S3 I-doped Bi2WO6 photocatalyst shows the photocatalytic efficiency about 97.6% and 50.0% for Rhodamine B and NO, respectively.

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Acknowledgments

This work was supported by the Student’s Platform for Innovation and Entrepreneurship Training Program Foundation (No. 1301070014).

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Authors and Affiliations

  1. School of Physics and Information Technology, Shaanxi Normal University, Xi’an, 710062, People’s Republic of China

    Xin Lu, Gangqiang Zhu, Rongxin Zhang, Shiping Li, Junli Nie & Fei Rao

  2. Science and Technology on Thermostructural Composite Materials Laboratory, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, People’s Republic of China

    Longkai Pan

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  1. Xin Lu
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  2. Gangqiang Zhu
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Correspondence to Gangqiang Zhu.

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Lu, X., Zhu, G., Zhang, R. et al. I-doped Bi2WO6 microflowers enhanced visible light photocatalytic activity for organic pollution degradation and NO removal. J Mater Sci: Mater Electron 30, 17787–17797 (2019). https://doi.org/10.1007/s10854-019-02130-1

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  • DOI: https://doi.org/10.1007/s10854-019-02130-1

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