Photocatalytic degradation of gaseous toluene over ZnAl2O4 prepared by different methods: A comparative study
Photocatalytic degradation of gaseous toluene over ZnAl2O4 prepared by different methods: A comparative study
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不同方法制备的ZnAl2O4光催化降解气态甲苯的比较研究
DOI：
10.1016/j.jhazmat.2010.12.111
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发表时间：
2011-02-28
影响因子：
13.6
通讯作者：
Wang, Lianzhou
中科院分区：
文献类型：
--
作者：
Li, Xinyong;Zhu, Zhengru;Wang, Lianzhou
非常需要开发针对典型室内污染物（例如甲苯）的“绿色”处理工艺。在这项研究中。 ZnAl2O4 纳米粒子通过三种不同的途径制备，即溶剂热法、柠檬酸盐前驱体法和水热法。通过X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、能量色散X射线光谱（EDX）系统地研究了它们的结构特性。 Brunauer-Emmett-Teller (BET)、紫外-可见漫反射光谱 (DRS) 和傅里叶变换红外光谱 (FT-IR) 技术。通过表面光电压（SPV）测量证明了样品中的光致电荷分离。通过原位 FTIR 反应器中紫外灯照射下气态甲苯的降解，比较研究了 ZnAl2O4 样品和纳米结构 TiO2 样品的光催化性能。结果表明，通过简便的溶剂热法合成的样品对甲苯的光催化效率约为90%。甲苯矿化成二氧化碳和水作为主要物质。紫外照射的 ZnAl2O4 上气态污染物的光催化氧化是一种有前景的空气净化技术。 (C) 2011 Elsevier B.V. 保留所有权利。
The development of a "green" treatment process for typical indoor pollutants such as toluene is greatly desirable. In this study. ZnAl2O4 nanoparticles were prepared via three different routes, i.e., solvothermal, citrate precursor and hydrothermal methods. Their structural properties were systematically investigated by X-ray powder diffraction (XRD), scanning electronic microscopy (SEM), energy-dispersive X-ray spectra (EDX). Brunauer-Emmett-Teller (BET), UV-vis diffuse reflectance spectroscopy (DRS), and Fourier transform infrared spectroscopy (FT-IR) techniques. The photo-induced charge separation in the samples was demonstrated by surface photovoltage (SPV) measurement. The photocatalytic performances of the ZnAl2O4 samples and nanostructured TiO2 samples were comparatively studied by the degradation of gaseous toluene under UV lamp irradiation in in situ FTIR reactor. The results indicated that the sample synthesized by facile solvothermal method exhibited about 90% photocatalytic efficiency of toluene. The toluene was mineralized into carbon dioxide and water as the major species. The photocatalytic oxidation of gaseous pollutant over UV-illuminated ZnAl2O4 is a promising technique for air purification. (C) 2011 Elsevier B.V. All rights reserved.