Heterogeneous reactions of NO2 on NaCl and Al2O3 particles

被引：70

作者：

Goodman, AL ^{[1
]}

Miller, TM ^{[1
]}

Grassian, VH ^{[1
]}

机构：

[1] Univ Iowa, Dept Chem, Iowa City, IA 52242 USA

来源：

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A | 1998年 / 16卷 / 04期

关键词：

D O I：

10.1116/1.581386

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this study, heterogeneous reactions of NO2 on NaCl and Al2O3 particles, two different types of particles present in the Earth's atmosphere, are compared. Transmission Fourier-transform infrared spectroscopy and diffuse reflectance UV/Vis spectroscopy are used to characterize gas-phase and adsorbed products following reaction with NO2. For Al2O3 particles, two adsorbed species have been identified. At low NO2 pressures, adsorbed nitrite is formed whereas at higher NO2 pressures, nitrate is present on the surface of the aluminum oxide particles. For NaCl particles, adsorbed nitrate forms at all NO2 pressures. Kinetic measurements show that nitrate formation on sodium chloride is second order in NO2 pressure, in agreement with previous studies, whereas nitrate formation on aluminum oxide is first order in NO2 pressure. The potential importance of heterogeneous reactions of NO2 with these particles in the atmosphere is discussed. (C) 1998 American Vacuum Society. [S0734-2102(98)11604-4].

引用

页码：2585 / 2590

页数：6

共 28 条

[1] Water-induced reorganization of ultrathin nitrate films on NaCl: Implications for the tropospheric chemistry of sea salt particles [J].