Facile synthesis of Bi/Bi2WO6 nanocomposite with enhanced photocatalytic activity under visible light
Facile synthesis of Bi/Bi2WO6 nanocomposite with enhanced photocatalytic activity under visible light
复制标题
DOI：
10.1016/j.apcatb.2016.05.022
复制
发表时间：
2016-11-05
影响因子：
22.1
通讯作者：
Li, Xi
中科院分区：
文献类型：
--
作者：
Huang, Yongkui;Kang, Shifei;Li, Xi
将等离子体金属纳米结构修饰成半导体结构是提高光催化降解水中污染物活性的有效方法。在本研究中，一个可见光驱动的光催化剂Bi/Bi 2 WO 6成功地通过一个简单的两步路线。采用X射线衍射、拉曼光谱、红外光谱、场发射扫描电子显微镜、透射电子显微镜、X射线光电子能谱、紫外-可见漫反射光谱、氮气吸附-脱附等温线和光致发光光谱等手段对样品进行了系统的表征。以罗丹明B和4-氯苯酚为目标化合物，在可见光照射下考察了Bi/Bi 2 WO 6复合材料的光催化降解性能。结果表明，Bi纳米粒子的负载对Bi 2 WO 6的光催化活性有很大的影响。确定了Bi/Bi 2 WO 6复合材料光催化活性的最佳Bi含量。并对降解过程的光催化机理进行了深入的探讨。Bi/Bi 2 WO 6复合材料的光催化性能增强应归因于强的可见光吸收、表面等离子体共振（SPR）效应、高的电子-空穴迁移效率以及Bi纳米颗粒与Bi 2 WO 6之间的界面相互作用。(C)2016爱思唯尔B. V.保留所有权利。
Incorporating plasmonic metal nanostructures into semiconductors has been regarded as an effective method to improve the photocatalytic activity for degradation of pollutants in water. In this study, a visible-light-driven photocatalyst Bi/Bi2WO6 was successfully fabricated by a simple two-step route. The samples were systematically characterized by X-ray diffraction, Raman spectroscopy, infrared spectra, field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, UV-vis diffuse reflection spectroscopy, nitrogen absorption-desorption isotherms, and photoluminescence spectroscopy. The photocatalytic performance of the Bi/Bi2WO6 composite was evaluated by the photocatalytic decomposition of Rhodamine B and 4-Chlorophenol under visible-light irradiation. The results revealed that the loaded Bi nanoparticles have great influences on the photo catalytic activity of Bi2WO6. The optimal Bi content for the photocatalytic activity of the Bi/Bi2WO6 composite was determined. Moreover, the photocatalytic mechanism of the degradation processes was thoroughly elucidated. The enhanced photocatalytic performance of the Bi/Bi2WO6 composite should be attributed to the strong visible light absorption, the surface plasmonic resonance (SPR) effect, the high migration efficiency of the electron-holes, and the interfacial interaction between Bi nanoparticles and Bi2WO6. (C) 2016 Elsevier B.V. All rights reserved.