Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2010, Vol. 21 ›› Issue (5): 261-265 doi: 10.13538/j.1001-8042/nst.21.261-265

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Study of automobile exhaust particles by spectromicroscopy

YANG Chuanjun GUO Zhi ZHANG Xiangzhi WANG Yong XU Zhijian ZHANG Lijuan TAI Renzhong BAO Liangman LI Xiaolin ZHANG Guilin LI Yan   

  1. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
YANG Chuanjun, GUO Zhi, ZHANG Xiangzhi, WANG Yong, XU Zhijian, ZHANG Lijuan. Study of automobile exhaust particles by spectromicroscopy.Nuclear Science and Techniques, 2010, 21(5): 261-265     doi: 10.13538/j.1001-8042/nst.21.261-265

Abstract:

In this paper, automobile exhaust particles of Gol and Santana 3000 were studied by spectromicroscopy. The STXM results show that the single particulate is sized at 500 nm, with the mass distribution reducing towards the center. The N 1s NEXAFS spectra of automobile exhaust particles have similar structure with those of nitrates, which can be deduced as the main chemical species of nitrogen in automobile exhaust particles. There are minor amounts of ammoniums and organic nitrogen compounds in automobile exhaust particles. A single Gol automobile exhaust particle was stack scanned in the energy range of 396–416 eV. By principal component analysis and cluster analysis, it can be deduced that there are main three chemical species of nitrogen. The particle surface consists of mainly nitrates, the inside consists of mainly ammonium and organic nitrogen compounds, and the middle layer is an intergradation consisting of mainly nitrates and organic nitrogen compounds.

Key words: STXM, NEXAFS, Automobile exhaust particulate