Reinterpret the heterogeneous reaction of α-Fe_(2)O_(3) and NO_(2) with 2D-COS:The role of SDS,UV and SO_(2)  

作　　者：Haojie Duan Hejingying Niu Lina Gan Xiaodi Duan Shuo Shi Li Li 

机构地区：[1]School of Environmental&Chemical Engineering,Shanghai University,Shanghai 200444,China [2]School of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China [3]Shanghai Aircraft Design and Research Institute,Shanghai 201210,China

出　　处：《Chinese Chemical Letters》2024年第6期469-473,共5页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.41807304 and 22206130)。

摘　　要：Heterogeneous reaction of mineral aerosols and atmospheric polluting gases play an important role in atmospheric chemistry.In this study,the reactions of NO_(2) with or without SO_(2) mixture gas on the surface of α-Fe_(2)O_(3) particles under dry conditions were studied.The effects of sodium dodecyl sulfate(SDS)and the heterogeneous reaction under both dark and UV irradiation conditions were investigated.The infrared spectrum analyzed by the two-dimensional correlation spectroscopy(2D-COS)was used to obtain the products formation sequences.The results showed that UV irradiation can promote the production of nitrate.The 2D-COS analysis indicated SDS changed the sequence order of nitrate and nitrite species during reactions.In oxidation conditions,the final product of heterogeneous reaction of NO_(2) and α-Fe_(2)O_(3) was monodentate nitrate.Only the heterogenous reaction of NO_(2) and α-Fe_(2)O_(3) containing SDS(FOS)without UV light,the final product was bidentate nitrate.SDS was the catalysis agent supply and photoresist to the system.With surface active compounds,the environmental lifetime of heterogeneous reactions between trace gases and aerosols extends.Surfactants,ultraviolet light,and the types of gases involved in the reaction all have complex effects on the aerosol aging process.This study provided a reference for subsequent heterogeneous reaction studies and the formation of aerosols.

关 键 词：Heterogeneous reaction α-Fe_(2)O_(3) 2D-COS SDS AEROSOL 

分 类 号：X51[环境科学与工程—环境工程] O643.12[理学—物理化学]