徐永福课题组 - Prof. YongFu Xu's Reasearch Group @ IAP CAS - Page 3

祝贺葛双双博士顺利毕业

组内消息 2017-07-17

葛双双同学于2017年5月19日顺利通过博士论文答辩。
博士论文题目“氯化钠存在下典型小分子有机物转化为二次有机气溶胶的烟雾箱研究”。
毕业去向:华东师范大学
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SOA formation from propylene is confirmed in our new paper

组内消息 2017-03-13

Secondary organic aerosol formation from propylene irradiations in a chamber study
通过烟雾箱实验证实丙烯可以在颗粒水中生成二次有机气溶胶,并发现NaCl颗粒中Cl参与了二次有机颗粒物的形成。
Highlights:
1.Formation of SOA from propylene is confirmed for the first time.
2.Main chemical compositions of propylene SOA are determined.
3.Participation of Cl atoms in the formation of SOA is determined.
ESI-Exactive-Orbitrap MS results of SOA from propylene.jpg
ESI-Exactive-Orbitrap MS results of SOA from propylene
Full text on line
Ge Shuangshuang, Xu Yongfu, Jia Long. Secondary organic aerosol formation from propylene irradiations in a chamber study. Atmospheric Environment, DOI:10.1016/j.atmosenv.2017.03.019

Our manuscript has been published as a discussion paper in ACPD

组内消息 2017-02-15

Photooxidation of cyclohexene in the presence of SO2: SOA yield and chemical composition

Abstract. Secondary organic aerosol (SOA) formation from cyclohexene/NOx system with various SO2 concentrations under UV light was studied to understand the effects of cyclic alkenes on the atmospheric environment in polluted urban areas. A clear decrease at first and then increase of the SOA yield was found with increasing SO2 concentrations. The lowest SOA yield was obtained when initial SO2 concentration was in the range of 30–40 ppb, while higher SOA yield compared to that without SO2 could not be obtained until the initial SO2 concentration was higher than 85 ppb. SOA formation was enhanced by the acid-catalyzed heterogeneous reactions, which lead to an increase in the total organic aerosol mass. The competitive reaction of OH radicals with SO2 and VOCs was the reason for the SOA yield decrease even under acidic conditions. The competitive reaction was an important factor for SOA yield and it should not be neglected in photooxidation, especially when acid-catalyzed mechanism could not significantly improve SOA yield. The composition of organic compounds in SOA was measured using several complementary techniques including Fourier transform infrared (FTIR) spectrometer, ion chromatograph (IC) and electrospray ionization high-resolution quadrupole mass spectrometer (ESI-HR-MS). We present the first evidence that organosulfates were produced from the photooxidation of cyclohexene in the presence of SO2.
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. Discuss., doi:10.5194/acp-2017-30