Heterogeneous reaction of NO_2 on the surface of montmorillonite particles  

作　　者：Zefeng Zhang Jing Shang Tong Zhu Hongjun Li Defeng Zhao Yingju Liu Chunxiang Ye 

机构地区：[1]College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China [2]CMA Key Laboratory for Atmospheric Physics and Environment,Nanjing University of Information Science and Technology,Nanjing 210044,China

出　　处：《Journal of Environmental Sciences》2012年第10期1753-1758,共6页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 41005071,40490265,20637020);the National Basic Research Program of China(No. 2002CB410802 );the Special Fund of State Key Joint Laboratory of Environment Simulation and Pollution Control (No. 09K01ESPCP)

摘　　要：The studies on heterogeneous reactions over montmorillonite, which is a typical 2：1 layered aluminosilicate, will benefit to the Understanding of heterogeneous reactions on clay minerals. Montmorillonite can be classified as sodium montmorillonite or calcium montmorillonite depending on the cation presented between the different layers. Using diffuse reflectance infrared Fourier transform spectroscopy （DRIFTS）, the heterogeneous reaction mechanism of NO2 on the surface of montmorillonite was firstly investigated. Results showed that the reaction of NO2 on the surface of sodium and calcium montmorillonite fit a first-order kinetics, and the reaction duration of calcium montmorillonite was longer than that of sodium montmorillonite under the dry condition. For either sodium or calcium montmorillonite, the uptake coefficient decreased as humidity increased.The studies on heterogeneous reactions over montmorillonite, which is a typical 2：1 layered aluminosilicate, will benefit to the Understanding of heterogeneous reactions on clay minerals. Montmorillonite can be classified as sodium montmorillonite or calcium montmorillonite depending on the cation presented between the different layers. Using diffuse reflectance infrared Fourier transform spectroscopy （DRIFTS）, the heterogeneous reaction mechanism of NO2 on the surface of montmorillonite was firstly investigated. Results showed that the reaction of NO2 on the surface of sodium and calcium montmorillonite fit a first-order kinetics, and the reaction duration of calcium montmorillonite was longer than that of sodium montmorillonite under the dry condition. For either sodium or calcium montmorillonite, the uptake coefficient decreased as humidity increased.

关 键 词：heterogeneous reaction uptake coefficient DRIFTS MONTMORILLONITE NO2 

分 类 号：O484[理学—固体物理] TQ460.6[理学—物理]