Novel mesoporous CeVWO_(x)/TiO_(2)nanosheets for selective catalytic reduction of NO by NH_(3)  

作　　者：Shihao Li Mengli Han Youlin Liu Ronghai Zhang Xu Wang Jianhai Wang Sasa Gu Yuesong Shen 

机构地区：[1]College of Materials Science and Engineering,Nanjing Tech University,Nanjing,211816,China [2]Jiangsu Collaborative Innovaton Center for Advanced Inorganic Functon Composites,Nanjing Tech University,Nanjing,211816,China [3]State Key Laboratory of Materials-Oriented Chemical Engineering,Nanjing Tech University,Nanjing,211816,China [4]Jiangsu National Synergetic Innovation Center for Advanced Materials,Nanjing Tech University,Nanjing,211816,China

出　　处：《Journal of Rare Earths》2025年第3期500-507,I0003,共9页稀土学报(英文版)

基　　金：Project supported by National Key Research and Development Plan of China(2021YFB3802003,2022YFB3504102);the Key Research and Development Plan of Jiangsu Province(Social Development,BE2021713);the Six Talent Peaks Project of Jiangsu Province(JNHB-044);the Natural Science Foundation of Jiangsu Province of China(BK20160982)。

摘　　要：Herein,we report the self-sacrificial template strategy to design mesoporous layered CeVWO_(x)/TiO_(2)catalysts for the selective catalytic reduction of NO by NH_(3)(NH_(3)-SCR).As-fabricated CeVWO_(x)/TiO_(2)catalysts with unique mesoporous and layered structure were successfully prepared through the synthesis of Ce,Ti-MOFs by solvothermal method,the impregnation of vanadium and tungsten in Ce,Ti-MOFs and high temperature calcination process.As NH_(3)-SCR catalysts,well-designed CeVWO_(x)/TiO_(2)catalysts exhibit excellent SCR activity with the NO_(x)conversion of over 90%between 210 and 470℃.Meanwhile,CeVWO_(x)/TiO_(2)shows superior tolerance to water vapor and SO_(2).The features of unique mesoporous layered nanostructure,surface acidity,tunable reducibility,active and the strong interaction of active metal oxide and support in CeVWO_(x)/TiO_(2)nanosheets should contribute to the improved SCR performance.In situ diffuse reflection infrared Fourier transform spectroscopy(DRIFTS)analysis indicates that both Langmuir-Hinshelwood(L-H)and Eley-Rideal(E-R)mechanisms are present on the surface of CeVWO_(x)/TiO_(2)at low temperature.This work offers a facile strategy to design and fabricate efficient 2D deNO_x catalyst.

关 键 词：Mesoporous nanosheets Dual metal MOF Wide temperature window NH_(3)-SCR Rare earths 

分 类 号：O643.36[理学—物理化学]