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New smog chamber and new instrument

Publish: February 3, 2018 Category: 最新消息 No Comments

Our new smog chamber. There are two collapsible 5 m^3 reactors inside the chamber.
smog chamber IAPC
We have acquired a Thermo Q-Exactive mass spectrometry. This instrument has a high-field Orbitrap that combines a resolution of up to 140,000 with high scan speed. The new chamber and Q-Exactive will be used for our secondary organic aerosol research projects.
Q Exactive Mass Spectrometer
Thermo Scientific Q Exactive Mass Spectrometer paired with the Ultimate 3000 LC System

New publication in ACPD: Insight into roles of water on aerosol formation from isoprene and toluene

Publish: December 14, 2017 Category: 最新消息 No Comments

Different roles of water in secondary organic aerosol formation from toluene and isoprene

Short Summary: In this work, the opposite effects of relative humidity (RH) on secondary organic aerosol (SOA) formation from toluene and isoprene were observed and have been well explained in terms of various experimental data and model simulations. The increase of SOA from toluene under humid conditions is mainly contributed by aqueous reactions of water soluble products, whereas SOA formation from isoprene-NO2 irradiations is controlled by stable Criegee intermediates that are greatly influenced by water.

https://www.atmos-chem-phys-discuss.net/acp-2017-1064/

Citation: Jia, L. and Xu, Y.: Different roles of water in secondary organic aerosol formation from toluene and isoprene, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-1064

The manuscript about SOA formation from cyclohexene in the presence of SO2 has been published in ACP

Publish: November 9, 2017 Category: 最新消息 No Comments

Photooxidation of cyclohexene in the presence of SO2: SOA yield and chemical composition
SOA yields vs SO2.jpg
SOA yields of cyclohexene photooxidation in the presence of NOx at different initial SO2 concentrations
Full text
Citation: Liu, S., Jia, L., Xu, Y., Tsona, N. T., Ge, S., and Du, L.: Photooxidation of cyclohexene in the presence of SO2: SOA yield and chemical composition, Atmos. Chem. Phys., 17, 13329-13343, https://doi.org/10.5194/acp-17-13329-2017, 2017.