Home    中文  
 
Just Accepted  |  Current Issue  |  Archive  |  Featured Articles  |  Most Read  |  Most Download  |  Most Cited

Chem. J. Chinese Universities ›› 2026, Vol. 47 ›› Issue (7): 20250348.doi: 10.7503/cjcu20250348

• Analytical Chemistry • Previous Articles     Next Articles

Vacuum Ultraviolet Photoionization Mass Spectrometry Study on the Formation of Nitrophenols Generated by Photooxidation of Benzene

QIAN Zichao1, HUANG Mingqiang1(), SHAN Xianbin2, SHENG Liusi2, HU Changjin3, GU Xuejun3, ZHAO Weixiong3, Zhang Weijun3   

  1. 1.Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology,College of Chemistry & Chemical Engineering and Environment,Minnan Normal University,Zhangzhou 363000,China
    2.National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China
    3.Laboratory of Atmospheric Physico?Chemistry,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China
  • Received:2025-11-13 Online:2026-07-10 Published:2026-03-18
  • Contact: HUANG Mingqiang E-mail:huangmingqiang@mnnu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(42275136);the Natural Science Foundation of Fujian Province, China(2025J01972)

Abstract:

Nitrophenols(NPs) are a common type of nitrogen-containing organic components in atmospheric aerosols. Aromatic compounds such as benzene and toluene from vehicle exhaust and other anthropogenic sources can undergo atmospheric chemical reactions and secondary formation of NPs. The atmospheric chemical process for photooxidation of benzene in the presence of sodium nitrate(NaNO3) fine particles to form secondary organic aerosol(SOA) was simulated with a smog chamber in this study. The on-line measurement of chemical components of benzene SOA was studied by using a synchrotron radiation vacuum ultraviolet photoionization aerosol mass spectrometer(VUV-PIAMS). Based on the photoionization mass spectra and the photoionization efficiency curves of ion peaks detected by VUV-PIAMS, the ionization potentials were obtained for qualitative analysis of the chemical components. The experimental results demonstrated that in the presence of NaNO3 fine particles, the mass of SOA produced by benzene photooxidation significantly increased. The photoionization mass spectra of SOA showed new peaks with m/z 139, 155, 171, 184 and 200, and the ionization potentials of these peaks were (8.81±0.03), (9.36±0.03), (8.68±0.03), (8.75±0.03), (9.55±0.03) and (9.17±0.03) eV, respectively. Combining quantum chemical calculations, it was analyzed and identified that NPs such as nitrophenol, nitrocatechol, nitropyrogallol, dinitrophenol and dinitrocatechol were the main components of benzene SOA in the presence of NaNO3 fine particles. These provide the experimental basis for source identification and formation mechanism study of NPs components in atmospheric SOA particles under the background of the presence of NaNO3 fine particles.

Key words: Nitrophenols, Benzene, Secondary organic aerosol, Synchrotron radiation, Photoionization mass spectra

CLC Number: 

TrendMD: