Journal
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
Volume 111, Issue 4, Pages 1139-1145Publisher
SPRINGER
DOI: 10.1007/s00339-012-7331-6
Keywords
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Funding
- National Nature Science Foundation [51172187]
- SPDRF [20116102130002]
- 111 Program of MOE [B08040]
- Xi'an Science and Technology Foundation [CX1261-2, CX1261-3, XA-AM-201003]
- Doctorate Foundation [CX201208]
- Graduate Starting Seed Fund of NPU of China [Z2012021]
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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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