Modification of TiO2 nanorods by Bi2MoO6 nanoparticles for high performance visible-light photocatalysis
Modification of TiO2 nanorods by Bi2MoO6 nanoparticles for high performance visible-light photocatalysis
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DOI：
10.1016/j.jallcom.2011.07.102
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发表时间：
2011-10
影响因子：
6.2
通讯作者：
Na Li;Li Zhu;Wei‐De Zhang;Yu-Xiang Yu-Yu-Xiang-Yu-15584148;Wenhui Zhang;M. Hou
中科院分区：
文献类型：
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作者：
Na Li;Li Zhu;Wei‐De Zhang;Yu-Xiang Yu-Yu-Xiang-Yu-15584148;Wenhui Zhang;M. Hou
本研究采用水热法制备tio2纳米棒，然后采用溶剂热法将bi2moo6纳米颗粒沉积在tio2纳米棒上。采用x射线衍射、扫描电镜和透射电镜、x射线光电子能谱和紫外-可见漫反射光谱对纳米结构Bi2MoO6/ tio2复合材料进行了广泛的表征。通过对亚甲基蓝的降解评价了Bi2MoO6/ tio2复合材料的光催化活性。在可见光（λ>420nm）照射下，Bi2MoO6/ tio2复合材料对亚甲基蓝的降解具有比纯Bi2MoO6和tio2更高的催化活性。进一步研究表明，复合材料中bi2moo6与tio2的比例对其光催化活性有很大影响。实验结果表明，Bi2MoO6:TiO2=1:3的复合材料具有最高的光催化活性。讨论了复合催化剂的强化机理。
In this work, TiO2nanorods were prepared by a hydrothermal process and then Bi2MoO6nanoparticles were deposited onto the TiO2nanorods by a solvothermal process. The nanostructured Bi2MoO6/TiO2composites were extensively characterized by X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron spectroscopy and UV–vis diffuse reflectance spectroscopy. The photocatalytic activity of the Bi2MoO6/TiO2composites was evaluated by degradation of methylene blue. The Bi2MoO6/TiO2composites exhibit higher catalytic activity than pure Bi2MoO6and TiO2for degradation of methylene blue under visible light irradiation (λ>420nm). Further investigation revealed that the ratio of Bi2MoO6to TiO2in the composites greatly influenced their photocatalytic activity. The experimental results indicated that the composite with Bi2MoO6:TiO2=1:3 exhibited the highest photocatalytic activity. The enhancement mechanism of the composite catalysts was also discussed.