Preparation and Photocatalytic Properties of γ-Bi2O3/TiO2 Composite Fibers

doi:10.3724/SP.J.1077.2012.11490

Abstract

Abstract: Heterostructured γ-Bi₂O₃/TiO₂ composite fibers were prepared via combination of solvothermal method and electrospinning technique. X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscope (EDS), transmission electron microscope (TEM), high-resolution transmission electron microscope (HRTEM) and UV-Vis absorption spectra were used to characterize heterostructured γ-Bi₂O₃/TiO₂composite fibers. The photocatalytic properties of the heterostructured samples were evaluated by degrading rhodamine B (RB) under visible light irradiation. The results showed that γ-Bi₂O₃ nanosheets could evenly grow on the TiO₂ fibers surface and thus heterostructured γ-Bi₂O₃/TiO₂ composite fibers were successfully obtained. The absorption range of the as-obtained heterostructured samples were extended to the visible light region. Moreover, the presence of γ-Bi₂O₃ nanostructures/TiO₂ fibers heterostructures was beneficial to separation of photo-generated electrons and holes which enhanced the system’s quantum efficiency. In comparison with that of pure TiO₂ nanofibers, the γ-Bi₂O₃/TiO₂ heterostructures have enhanced photocatalytic efficiency under visible light irradiation, and the decolorizing efficiency of RB solution can reach 87.8%.

Key words: electrospinning, solvothermal method, γ-Bi₂O₃/TiO₂ composite fibers, photocatalytic degradation

CLC Number:

O643

LI Yue-Jun, CAO Tie-Ping, SHAO Chang-Lu, WANG Chang-Hua. Preparation and Photocatalytic Properties of γ-Bi₂O₃/TiO₂ Composite Fibers[J]. Journal of Inorganic Materials, 2012, 27(7): 687-692.

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Preparation and Photocatalytic Properties of γ-Bi₂O₃/TiO₂ Composite Fibers

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