高等学校化学学报2026，Vol.47Issue(7)：81-90,10.DOI:10.7503/cjcu20250348
苯光氧化形成硝基酚化合物的真空紫外光电离质谱研究
Vacuum Ultraviolet Photoionization Mass Spectrometry Study on the Formation of Nitrophenols Generated by Photooxidation of Benzene
摘要
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.关键词
硝基酚/苯/二次有机气溶胶/同步辐射/光电离质谱Key words
Nitrophenols/Benzene/Secondary organic aerosol/Synchrotron radiation/Photoionization mass spectra分类
化学化工引用本文复制引用
钱紫钞,黄明强,单晓斌,盛六四,胡长进,顾学军,赵卫雄,张为俊..苯光氧化形成硝基酚化合物的真空紫外光电离质谱研究[J].高等学校化学学报,2026,47(7):81-90,10.基金项目
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. Supported by the National Natural Science Foundation of China(No.42275136)and the Natural Science Foundation of Fujian Province,China(No.2025J01972). （批准号:42275136）
