Enhanced catalytic oxidation of dichloromethane by a surfactant-modified CeO_(2)@TiO_(2) core-shell nanostructured catalyst  

作　　者：Mengjie Fan Qingping Zou Jining Liu Yingwen Chen Jianliang Zhu Shubao Shen 

机构地区：[1]Research and Development Center for Watershed Environmental Eco-Engineering,Beijing Normal University,Zhuhai 519087,China [2]College of Biotechnology and Pharmaceutical Engineering,Nanjing Tech University,Nanjing 210009,China

出　　处：《Journal of Rare Earths》2023年第7期1031-1041,I0003,共12页稀土学报（英文版）

基　　金：Project supported by the Science and Technology Department of Jiangsu Province (BE2016769);the Natural Science Foundation of Jiangsu Province (BK20171466 and BK20180718)。

摘　　要：Surfactant-modified CeO_(2)@TiO_(2) core-shell nanostructure catalysts were prepared by coprecipitation with the addition of sodium dodecyl sulfonate(SDS),and their catalytic oxidation of dichloromethane(DCM) was studied.A 90% DCM conversion efficiency is obtained at 300℃ with the CeO_(2)@TiO_(2)SDS catalyst,and its catalytic stability in the 55 h test period is better than that of Ce/TiO_(2) and CeO_(2)@TiO_(2).Based on the characterization of CeO_(2)@TiO_(2)SDS,the dispersion of active components is promoted due to the inhibition of crystal growth with the introduction of SDS.The improvement of surface acidity and redox capacity is beneficial to the enhancement of catalytic activity.The higher adsorbed oxygen content on the surface of the CeO_(2)@TiO_(2)SDS catalyst is responsible for the better catalytic stability.Generally,a novel method was developed to design catalytic oxidation catalysts for the treatment of chlorinated volatile organic compounds in future applications.

关 键 词：SURFACTANT Oxidation Cerium titanium system Core-shell structure catalyst DICHLOROMETHANE Rare earths 

分 类 号：TQ426[化学工程] X701[环境科学与工程—环境工程]