高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

苯光氧化形成硝基酚化合物的真空紫外光电离质谱研究

钱紫钞1,黄明强1,单晓斌2,盛六四2,胡长进3,顾学军3,赵卫雄3,张为俊3   

  1. 1. 闽南师范大学化学化工与环境学院, 福建省现代分离分析科学与技术重点实验室

    2. 国家同步辐射实验室, 中国科学技术大学 3. 中国科学院安徽光学精密机械研究所大气物理化学实验室

  • 收稿日期:2025-11-14 修回日期:2026-03-11 出版日期:2026-03-18 发布日期:2026-03-18
  • 通讯作者: 黄明强 E-mail:huangmingqiang@mnnu.edu.cn
  • 基金资助:
    国家自然科学基金（批准号：42275136）和福建省自然科学基金（批准号：2025J01972）资助

Vacuum ultraviolet photoionization mass spectrometry study on the formation of nitrophenols generated by photooxidation of benzene

QIAN Zichao 1, HUANG Mingqiang 1, SHAN Xianbin 2, SHENG Liusi 2, HU Changjin 3, GU Xuejun 3, ZHAO Weixiong 3, Zhang Weijun 3   

  1. 1. Fujian Province Key Laboratory of Modern Analytical Science and Separation Technology, College of Chemistry & Chemical Engineering and Environment, Minnan Normal University

    2. National Synchrotron Radiation Laboratory, University of Science and Technology of China, 3. Laboratory of Atmospheric Physico-Chemistry, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

  • Received:2025-11-14 Revised:2026-03-11 Online:2026-03-18 Published:2026-03-18
  • Contact: Ming-Qiang HUANG E-mail:huangmingqiang@mnnu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China (No.42275136) and the Natural Science Foundation of Fujian Province of China           (No.2025J01972)

PDF (PC)

补充材料

1

摘要： 硝基酚化合物(NPs)是大气气溶胶中一类常见的含氮有机物组分. 来源于汽车尾气等人为源的苯、甲苯等芳香化合物可发生大气化学反应二次形成NPs. 本文利用烟雾箱模拟硝酸钠(NaNO3)细颗粒存在下苯光氧化产生二次有机气溶胶(SOA)的大气化学过程, 利用同步辐射真空紫外光电离气溶胶质谱仪(VUV-PIAMS) 对苯SOA开展化学组分在线测量研究. 基于VUV-PIAMS测得的光电离质谱和各离子峰的光电离效率曲线，获得电离势定性分析组分结构. 实验结果表明, NaNO3细颗粒存在时，苯光氧化产生SOA的质量显著增加，SOA的光电离质谱新出现m/z=139, 155, 171, 184和200质谱峰, 这些质谱峰的电离势分别为8.81±0.03、9.36±0.03、8.68±0.03、8.75±0.03、9.55±0.03和9.17±0.03 eV. 结合量子化学计算分析鉴定硝基苯酚、硝基邻苯二酚、硝基邻苯三酚、二硝基苯酚和二硝基邻苯二酚等NPs是NaNO3细颗粒存在时苯SOA的主要组分. 这为NaNO3细颗粒存在背景下大气SOA颗粒NPs组分的来源指认和形成机理研究提供了实验依据.

关键词: 硝基酚, 苯, 二次有机气溶胶, 同步辐射, 光电离质谱

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 presence of sodium nitrate (NaNO3) fine particles to form secondary organic aerosol (SOA) was simulated with smog chamber in this study. The on-line measurement of chemical components of benzene SOA was studied by using 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 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 main components of benzene SOA in 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

中图分类号: 

TrendMD: