点击次数：

论文类型：期刊论文

发表时间：2017-03-01

发表刊物：7th China-Japan Workshop on Environmental Catalysis and Eco-Materials

收录刊物：SCIE、EI、CPCI-S

卷号：281

页面范围：527-533

ISSN号：0920-5861

关键字：Non-thermal plasma; MCM-41; Incorporation; Impregnation; Toluene

摘要：The destruction of low concentrations of toluene in air streams using a non-thermal plasma catalysis system has been investigated in this study. A series of highly active cobalt incorporated MCM-41 (Co-MCM-41) catalysts were synthesized by a hydrothermal method. For comparison, cobalt-impregnated MCM-41 (Co-MCM-41_imp) catalysts were prepared via an impregnation method. The synthesized samples were characterized by X-ray diffraction (XRD), nitrogen adsorption-desorption isotherms, UV-vis diffuse reflection spectrum (UV-vis DRS), Hz-temperature-programmed reduction analyses (H-2-TPR) and transmission electron microscopy (TEM). The results showed that the cobalt modified samples retained the highly ordered mesopore structure of MCM-41. In addition, the cobalt species on Co-MCM-41 was highly dispersed in the silica framework of MCM-41 molecular sieves, while the cobalt on Co-MCM-41_imp was present as cobalt oxide clusters or Co3O4 nano-particles on the external surface of MCM-41. The non-thermal plasma catalytic performance of the catalysts was evaluated by toluene oxidation using a dielectric barrier discharge (DBD) reactor. The results showed that the Co-MCM-41 exhibited better catalytic activity and stability than Co-MCM-41_imp. The main reason for the enhanced catalytic performance and stability was attributed to the well dispersion of cobalt species, good ozone decomposition activities and the high ability to degrade organic intermediates on catalyst surface. (C) 2016 Elsevier B.V. All rights reserved.