Hydrothermal synthesis and photoelectric properties of BiVO4 with different morphologies: An efficient visible-light photocatalyst
Hydrothermal synthesis and photoelectric properties of BiVO4 with different morphologies: An efficient visible-light photocatalyst
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DOI：
10.1016/j.apsusc.2011.04.025
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发表时间：
2011-06
影响因子：
6.7
通讯作者：
H. Fan;Dejun Wang;Lingling Wang;Haiyan Li;Ping Wang;Tengfei Jiang;T. Xie
中科院分区：
文献类型：
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作者：
H. Fan;Dejun Wang;Lingling Wang;Haiyan Li;Ping Wang;Tengfei Jiang;T. Xie
通过简单调整表面活性剂（聚乙烯吡咯烷酮PVP K30）的添加量，水热合成了不同形貌、粒径较小的单斜bivo4。详细的场发射扫描电镜（FESEM）分析表明，PVP的添加量对BiVO4的形貌和尺寸有显著影响。通过对亚甲基蓝（MB）水溶液在可见光（λ> 400 nm）下的脱色实验，评价了它们的光催化活性。结果表明，由于具有较大的比表面积和光诱导载体的分离效率，制备的具有良好组装的花状结构的样品具有更高的光催化活性。利用表面光电压谱（SPS）和相谱研究了光诱导载体的行为和光催化活性之间的关系。
Different morphologies of monoclinic BiVO4with smaller size were hydrothermal synthesized by simply adjusting the amount of surfactant (polyvinyl pyrrolidone PVP K30) added. The detailed field emission scanning electron microscope (FESEM) analysis revealed that the amount of PVP added could significantly affect the morphology and size of BiVO4. Their photocatalytic activities were evaluated by the decolorization of methylene blue (MB) aqueous solution under visible-light irradiation (λ> 400 nm), and the as-prepared sample with well-assembled flower-like morphology showed a much higher photocatalytic activity due to larger specific surface area and higher separation efficiency of photo-induced carriers. The relationship between the behavior of photo-induced carriers and photocatalytic activity was studied using the surface photovoltage spectroscopy (SPS) and corresponding phase spectra.