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Raman micro-spectrometry as a technique for investigating heterogeneous reactions on individual atmospheric particles

查看全文 作　　者：ZHAO DeFeng,ZHU Tong,CHEN Qi,LIU YingJun & ZHANG ZeFeng State Key Joint Laboratory of Environmental Simulation and Pollution Control;College of Environmental Sciences and Engineering,Peking University,Beijing 100871,China 高影响力作者 出　　处：《Science China Chemistry》索引2011年第54卷第1期,共7页高影响力期刊 基　　金：financially supported by the National Natural Science Foundation of China (20637020, 40490265 & 20077001);National Basic Research Program of China (2002CB410802);special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control 摘　　要：Investigating the heterogeneous reaction on individual atmospheric particles is important because it approximates actual atmospheric conditions and can aid in reducing artifacts in elucidating real mechanisms and processes,and determining real kinetic parameters of the atmosphere relevance.This study developed a Raman microspectrometry method to investigate heterogeneous reactions on individual particles.The method was applied to the reaction of NO2 with individual CaCO3 particles.It was demonstrated that Raman microspectrometry can obtain information on both chemical composition and microscopic morphology at the same time,as well as information on chemical characteristics,such as the phase,which is useful for studying reaction processes.Raman spectra of individual particles deposited on a substrate showed no interference by morphological resonance,which is helpful for obtaining high-quality spectra.Moreover,Raman microspectrometry was compared with other methods for investigating heterogeneous reactions on individual particles and was found to have several advantageous characteristics. 关 键 词：大气颗粒物 拉曼光谱 非均相反应 反应技术 大气条件 研究开发 化学组成 化学特性
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