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.
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 ki- netic parameters of the atmosphere relevance. This study developed a Raman microspectrometry method to investigate hetero- geneous 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 mor- phology 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 reso- nance, 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.
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
