红外光谱研究大气痕量气体在α-Al_2O_3表面上的协同反应

Synergistic Reaction of Atmospheric Trace Gas onα-Alumina Using Micro-FTIR Spectroscopy

利用傅里叶变换显微红外光谱仪(micro-FTIR)研究SO2/O3,SO2/NO2在α-Al2O3颗粒物上的协同反应。结果表明,O3和NO2都可以氧化SO2在α-Al2O3矿尘上反应形成硫酸盐。比较生成的硫酸盐峰面积随反应时间的变化可以发现,O3/SO2在颗粒物表面的反应速率较NO2/SO2快。

This study focus on the synergistic effect of O3/SO2 and NO2/SO2onα-Aluminaby usingagas-flow system combined with a microscopic Fourier transform infrared(micro-FTIR)spectrometer.The result showed that the formation of sulfate from adsorbed SO2 was promotedby the coexisting O3 or NO2on the surface ofα-Alumina.Moreover,the reaction rate of O3/SO2onα-Alumina is faster thanthat of NO2/SO2 by comparing the peak area of sulfate along with the reaction time.