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Synthesizing Bi2O3/BiOCl heterojunctions by partial conversion of BiOCl

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Abstract

In this work, uniform BiOCl microspheres were used as self-sacrificed template to construct Bi2O3/BiOCl heterojunctions by a simple alkaline treatment method. Details of structure and chemical properties were carefully characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, X-ray photoelectron spectroscopy, UV–vis diffuse reflectance spectroscopy, and Brunauer–Emmett–Teller techniques. The results indicated that BiOCl microspheres composed of numerous nanosheets transformed to rod-like Bi2O3 nanostructures during the alkaline treatment, which resulted in strong visible-light absorption. The as-obtained Bi2O3/BiOCl heterojunctions exhibited remarkably enhanced photocatalytic performance for the degradation of methyl orange (MO) under visible-light irradiation, which was ~1.2 and 2.5 times as that of pure BiOCl and Bi2O3, respectively. The formation of Bi2O3/BiOCl heterojunctions facilitated the transfer and separation of photogenerated charge carriers which was further confirmed by the photocurrent measurement and photoluminescence spectra results. The finding reported here offers a valid in situ route for constructing heterojunction photocatalysts to effectively decompose the organic pollutants in aqueous solution.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC, 51462025).

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Authors and Affiliations

  1. College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, Inner Mongolia, 010021, People’s Republic of China

    Qihang Zhao, Xiaoyan Liu, Yongxing Xing, Zhiliang Liu & Chunfang Du

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  1. Qihang Zhao
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  2. Xiaoyan Liu
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  3. Yongxing Xing
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  4. Zhiliang Liu
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  5. Chunfang Du
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Correspondence to Chunfang Du.

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Zhao, Q., Liu, X., Xing, Y. et al. Synthesizing Bi2O3/BiOCl heterojunctions by partial conversion of BiOCl. J Mater Sci 52, 2117–2130 (2017). https://doi.org/10.1007/s10853-016-0499-y

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