Sol-Gel-Hydrothermal Synthesis of the Heterostructured - Composite with High-Visible-Light- and Ultraviolet-Light-Induced Photocatalytic Performances
Sol-Gel-Hydrothermal Synthesis of the Heterostructured - Composite with High-Visible-Light- and Ultraviolet-Light-Induced Photocatalytic Performances
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DOI：
10.1155/2012/469178
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发表时间：
2012
影响因子：
3.2
通讯作者：
Jiang Zhang;Zhenghong Huang;Yong-Xia Xu;F. Kang
中科院分区：
文献类型：
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作者：
Jiang Zhang;Zhenghong Huang;Yong-Xia Xu;F. Kang
采用简单的溶胶-凝胶-水热法制备了二氧化钛/N-Bi2WO6异质结构复合材料。用X射线粉末衍射仪(XRD)、扫描电子显微镜(SEM)、高分辨透射电子显微镜(HRTEM)、能谱(EDS)和紫外-可见漫反射光谱(UV-Vis)对样品的相结构、形貌和光学性能进行了表征。在室温可见光和紫外光照射下，测定了产物对罗丹明B的光催化活性。二氧化钛/N-Bi2WO6复合材料的光催化性能远高于TiO2光催化剂和Bi2WO6复合材料。二氧化钛/N-Bi2WO6复合材料可见光催化性能的提高归因于两种半导体界面的有效电子-空穴分离，促进了光生载流子的转移。
The heterostructured TiO2/N-Bi2WO6 composites were prepared by a facile sol-gel-hydrothermal method. The phase structures, morphologies, and optical properties of the samples were characterized by using X-ray powder diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS), and UV-vis diffuse reflectance spectroscopy. The photocatalytic activities for rhodamine B of the as-prepared products were measured under visible and ultraviolet light irradiation at room temperature. The TiO2/N-Bi2WO6 composites exhibited much higher photocatalytic performances than TiO2 as well as Bi2WO6. The enhancement in the visible light photocatalytic performance of the TiO2/N-Bi2WO6 composites could be attributed to the effective electron-hole separations at the interfaces of the two semiconductors, which facilitate the transfer of the photoinduced carriers.