Fabrication and efficient visible light-induced photocatalytic activity of Bi2WO6/BiVO4 heterojunction
Fabrication and efficient visible light-induced photocatalytic activity of Bi2WO6/BiVO4 heterojunction
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DOI：
10.1016/j.matchemphys.2012.07.013
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发表时间：
2012-10
影响因子：
4.6
通讯作者：
Xiufang Zhang;Y. Gong;Xiaoli Dong;Xinxin Zhang;Chun Ma;Fei Shi
中科院分区：
文献类型：
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作者：
Xiufang Zhang;Y. Gong;Xiaoli Dong;Xinxin Zhang;Chun Ma;Fei Shi
合成了具有异质结结构的Bi2WO6/BiVO4光催化剂。 X射线衍射（XRD）分析以及扫描电子显微镜（SEM）和透射电子显微镜（TEM）图像表明Bi2WO6纳米板负载在BiVO4表面上。紫外可见扩散吸收光谱（DRS）显示 BiVO4 和 Bi2WO6/BiVO4 的带隙吸收边没有明显差异。光催化测量发现，在可见光（λ > 400 nm）下，Bi2WO6/BiVO4 的苯酚降解率是 BiVO4 的 2.55 倍。 Bi2WO6/BiVO4 样品光催化性能的增强归因于 Bi2WO6 和 BiVO4 之间异质结产生的光生空穴电子对的分离效率的提高。
The Bi2WO6/BiVO4photocatalyst with heterojunction structure was synthesized. X-ray diffraction (XRD) analysis and scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images indicated that Bi2WO6nanoplate was loaded on the BiVO4surface. UV–vis diffusion absorption spectra (DRS) displayed no obvious difference between the band gap absorption edges of the BiVO4and Bi2WO6/BiVO4. It was found that the phenol degradation rate with Bi2WO6/BiVO4was 2.55 times as great as that with the BiVO4under visible light (λ > 400 nm) by the photocatalytic measurements. The enhanced photocatalytic performance of the Bi2WO6/BiVO4sample was attributed to the improved separation efficiency of photogenerated hole–electron pairs generated by the heterojunction between Bi2WO6and BiVO4.