Hydrothermal preparation and visible-light photocatalytic activity of Bi2WO6 powders
Hydrothermal preparation and visible-light photocatalytic activity of Bi2WO6 powders
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DOI：
10.1016/j.jssc.2005.04.003
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发表时间：
2005-06-01
影响因子：
3.3
通讯作者：
Wang, JB
中科院分区：
文献类型：
--
作者：
Yu, JG;Xiong, JF;Wang, JB
以硝酸铋和Na2WO4为原料，采用简单水热法制备了Bi2WO6粉末光催化剂，分别在150℃、300℃、400℃、500℃、600℃、700℃焙烧2 h。用紫外-可见漫反射光谱、傅里叶变换红外光谱、X射线衍射仪、扫描电子显微镜和氮气吸附-脱附测试对样品进行了表征。用室温下可见光催化氧化甲醛的方法评价了样品的光催化活性。结果表明，后处理温度对Bi2WO6粉末的可见光催化活性和物理性能有明显影响。在500℃时，Bi2WO6粉末光催化剂由于具有良好的晶化性能和较高的比表面积，具有最高的可见光催化活性。(C)2005 Elsevier Inc.保留所有权利。
Bi2WO6 powder photocatalyst was prepared using Bi(NO3)(3) and Na2WO4 as raw materials by a simple hydrothermal method at 150 degrees C for 24 h, and then calcined at 300, 400, 500, 600 and 700 degrees 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 N-2 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 degrees C, Bi2WO6 powder photocatalyst showed the highest visible-light photocatalytic activity due to the samples with good crystallization and high BET surface area. (c) 2005 Elsevier Inc. All rights reserved.