Robust photo-assisted removal of NO at room temperature:Experimental and density functional theory calculation with optical carrier  

作　　者：Yanqin Li Junqi Tian Zhisong Liu Zhongqi Liu Dong Dong Fu Wang Wei Wang Minmin Liu Jianming Dan Yongsheng Li Feng Yu Bin Dai Yunbo Yu 

机构地区：[1]Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan,School of Chemistry and Chemical Engineering,Shihezi University,Shihezi,832003,China [2]Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China [3]FermiTech(Beijing)Co.Ltd.,Beijing,100083,China [4]School of Biomedical Engineering,Shanghai Jiao Tong University,Shanghai,200240,China [5]Lab of Low-Dimensional Materials Chemistry,Key Laboratory for Ultrafine Materials of Ministry of Education,Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Materials Science and Engineering,East China University of Science&Technology,Shanghai,200237,China [6]Bingtuan Industrial Technology Research Institute,Shihezi University,Shihezi,832003,China

出　　处：《Green Energy & Environment》2023年第4期1102-1116,共15页绿色能源与环境（英文版）

基　　金：supported by Science and Technology Innovation Talents Program of Bingtuan (No.2019CB025);Major Scientific and Technological Project of Bingtuan (No.2018AA002);Project of Regional Innovation in Bingtuan (No.2021BB005)。

摘　　要：Photo-assisted SCR(PSCR) offers a potential solution for removal of NO at room temperature. MnTiO_(x)as PSCR catalyst exhibits superior performance with NO removal of 100% at the room temperature. Electron paramagnetic resonance(EPR) analysis revealed the presence of numerous oxygen vacancies on MnTiO_(x). Optical carrier density functional theory(DFT) calculations showed that the threedimensional orbital hybridization of Mn and Ti is significantly enhanced under light irradiation. The MnTiO_(x)catalyst exhibited excellent electron–hole separation ability, which can adsorbe NH_(3)and dissociate to form NH_(2)fragments and H atoms. In-situ diffuse reflectance infrared fourier-transform spectroscopy(DRIFTS) indicated that the optical carrier enhanced NH_(3)adsorption on MnTiO_(x), which makes it possess excellent PSCR activity. This work provided an additional strategy to NO removal with PSCR catalysts and showed potential for use in photocatalysis.

关 键 词：Mixed metal oxide Photoselective catalytic reduction PHOTOCATALYST DENITRATION Room-temperature catalysis 

分 类 号：X701[环境科学与工程—环境工程]