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Solid-state synthesis of Bi2O3/BaTiO3 heterostructure: preparation and photocatalytic degradation of methyl orange

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Abstract

In this work, Bi2O3/BaTiO3 heterostructure were prepared through a solid milling and annealing process. It was found that Bi3+ dissolved in the BaTiO3 lattice and the chemical bond was constructed between the interface of Bi2O3 and BaTiO3 after annealing process. Powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible absorption spectra were used to characterize the Bi2O3/BaTiO3 heterostructure. Furthermore, UV-induced catalytic activities of the Bi2O3/BaTiO3 heterostructure was studied by a degradation reaction of methyl orange (MO) dye. The band gap of the Bi2O3/BaTiO3 heterostructure was estimated to be 3.0 eV. Compared with pure Bi2O3 powders, the Bi2O3/BaTiO3 heterostructure had a much higher catalytic activity. An excellent performance of the photocatalytic property of the Bi2O3/BaTiO3 heterostructure is ascribed to high mobility of species and effective separation of photogenerated carriers driven by the photoinduced potential difference generated at the Bi2O3/BaTiO3 junction interface, demonstrating that the Bi2O3/BaTiO3 heterostructure is a promising candidate as a photocatalyst.

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Acknowledgements

This work was supported by National Nature Science Foundation (51172187), the SPDRF (20116102130002) and 111 Program (B08040) of MOE, and the Xi’an Science and Technology Foundation (CX1261-2, CX1261-3, XA-AM-201003), the Doctorate Foundation (CX201208) and Graduate Starting Seed Fund (Z2012021) of NPU of China.

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  1. State Key Laboratory of Solidification Processing, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Pengrong Ren, Huiqing Fan & Xin Wang

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  1. Pengrong Ren
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  2. Huiqing Fan
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  3. Xin Wang
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Correspondence to Huiqing Fan.

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Ren, P., Fan, H. & Wang, X. Solid-state synthesis of Bi2O3/BaTiO3 heterostructure: preparation and photocatalytic degradation of methyl orange. Appl. Phys. A 111, 1139–1145 (2013). https://doi.org/10.1007/s00339-012-7331-6

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  • DOI: https://doi.org/10.1007/s00339-012-7331-6

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