Photodegradation of benzene, toluene and xylenes under visible light applying N-doped mixed TiO2 and ZnO catalysts
Photodegradation of benzene, toluene and xylenes under visible light applying N-doped mixed TiO2 and ZnO catalysts
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DOI：
10.1016/j.cattod.2014.03.042
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发表时间：
2015-03-01
期刊：
影响因子：
5.3
通讯作者：
Fernandes-Machado, N. R. C.
中科院分区：
文献类型：
--
作者：
Ferrari-Lima, A. M.;de Souza, R. P.;Fernandes-Machado, N. R. C.
采用溶胶-凝胶法制备了n掺杂TiO2/ZnO催化剂，分别在380℃和500℃下煅烧，并在可见光下对其光催化降解苯、甲苯和二甲苯（BTX）的活性进行了评价，并与未掺杂TiO2/ZnO的活性进行了比较。发现掺氮量为0.64 at%。采用顶空气相色谱法分析了BTX的浓度。在500℃下煅烧的N-TiO2/ZnO催化剂经过120 min的辐照后，苯、甲苯和二甲苯的浓度降低了80 wt%以上。光催化反应符合一级动力学。(C) 2014 Elsevier B.V.版权所有
N-doped TiO2/ZnO catalysts were prepared by sol-gel technique and calcined at 380 and 500 degrees C. Its photocatalytic activity was evaluated in the photodegradation of benzene, toluene and xylenes (BTX) under visible-LED light and compared with the undoped TiO2/ZnO activity. The amount of doped nitrogen was found to be 0.64 at%. Concentrations of BTX were analysed by gas chromatography applying the headspace technique. The N-TiO2/ZnO catalyst calcined at 500 degrees C led to reductions of benzene, toluene and xylenes concentrations greater than 80 wt% after 120 min of irradiation. The photocatalytic reactions followed the first order kinetics. (C) 2014 Elsevier B.V. All rights reserved.