Preparation and Energy Stored Photocatalytic Properties of WO3/TiO2 Composite Fibers

doi:10.3969/j.issn.0251-0790.2012.07.034

Abstract

Abstract: Heterostructured WO₃/TiO₂ composite fibers were prepared via electrospinning fabrication of anatase fibers by adopting n-butyl titanate as precursors and hydrothermal growth of WO₃ nanostructures on anatase fibers substrate. The morphology and structure of WO₃/TiO₂ composite fibers were characte-rized by X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive X-ray spectroscopy(EDS), transmission electron microscopy(TEM) and high resolution transmission electron microscopy(HRTEM) techniques. The results showed that flower-like WO₃ microsphere could evenly grow on the TiO₂ fibers surface and thus heterostructured WO₃/TiO₂ composite fibers were successfully obtained. By employing Rhodamine B degradation as the model reaction, the WO₃/TiO₂ heterostructures showed enhanced photocatalytic efficiency compared with the bare TiO₂ fibers under UV light irradiation. The enhanced photocatalytic efficiency could be ascribed to the promoted electron-hole pairs separation induced by the heterojunction and thus enhanced quantum efficiency. Degradation experiment displays that Rhodamine B can be degraded in darkness by the WO₃/TiO₂ composite fibers photocatalyst with energy storage degradation activity.

Key words: Electrospinning technique, Hydrothermal method, WO₃/TiO₂composite fibers, Energy storage, Photocatalytic degradation

CLC Number:

O643

TrendMD:

LI Yue-Jun, CAO Tie-Ping, SHAO Chang-Lu, WANG Chang-Hua. Preparation and Energy Stored Photocatalytic Properties of WO₃/TiO₂ Composite Fibers[J]. Chem. J. Chinese Universities, 2012, 33(07): 1552.

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Preparation and Energy Stored Photocatalytic Properties of WO₃/TiO₂ Composite Fibers

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