Hydrothermal Synthesis of Tungsten Trioxide with Different Morphologies and their Application in Water Treatment

doi:10.7517/j.issn.1674-0475.2012.03.216

Abstract

Abstract: Tungsten trioxide (WO₃) with narrow band gap, becomes a promising n-type semiconductor photocatalyst after titanium dioxide (TiO₂). In this work, WO₃nanostructures were synthesized by hydrothermal method. Different morphologies and crystalline structures could be obtained by tailoring reaction parameters, such as precursor composition and precipitation time,etc. The as-prepared WO₃ products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), and N₂ adsorption-desorption. The precursor composition and precipitation time were found to largely affect the morphology and crystalline structure of WO₃nanostructures. The obtained WO₃ products were applied for the removal of methylene blue in aqueous solution. It showed that all the obtained WO₃ nanostructures exhibited high activities for the removal of methylene blue, and 97 % of methylene blue could be removed.

Key words: WO₃, hydrothermal synthesis, methylene blue, catalytic degradation

CLC Number:

HAN Wen-mei, HE Jun-hui. Hydrothermal Synthesis of Tungsten Trioxide with Different Morphologies and their Application in Water Treatment[J]. Imaging Science and Photochemistry, 2012, 30(3): 216-227.

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