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Hydrothermal preparation and visible-light photocatalytic activity of Bi2WO6 powders |
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| Authors: | Jiaguo Yu Jianfeng Xiong Ying Yu |
| Institution: | a State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China b College of Physical Science and Technology, Central China Normal University, Wuhan 430079, PR China c Center for Electron Microscopy, Wuhan University, Wuhan 430072, PR China |
| Abstract: | Bi2WO6 powder photocatalyst was prepared using Bi(NO3)3 and Na2WO4 as raw materials by a simple hydrothermal method at 150 °C for 24 h, and then calcined at 300, 400, 500, 600 and 700 °C for 2 h, respectively. The as-prepared samples were characterized with UV-visible diffuse reflectance spectra, fourier transform infrared spectra (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and N2 adsorption-desorption measurement. The photocatalytic activity of the samples was evaluated using the photocatalytic oxidation of formaldehyde at room temperature under visible light irradiation. It was found that post-treatment temperature obviously influenced the visible-light photocatalytic activity and physical properties of Bi2WO6 powders. At 500 °C, Bi2WO6 powder photocatalyst showed the highest visible-light photocatalytic activity due to the samples with good crystallization and high BET surface area. |
| Keywords: | Bi2WO6 Preparation Hydrothermal reaction Visible-light Photocatalytic activity Formaldehyde |
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