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题名: Effect of the blocked-sites phenomenon on the heterogeneous reaction of pyrene with N2O5/NO3/NO2
作者: Zhang, Peng; Sun, Wanqi; Yang, Bo; Shu, Jinian; Dong, Liang
刊名: RSC ADVANCES
出版日期: 2016-01
卷号: 6, 期号:13, 页码:10358-10364
DOI: 10.1039/c5ra24368h
部门归属: 大气污染控制中心
英文摘要: To clarify whether the blocking reaction sites problem has a significant impact on heterogeneous reactions, experiments contrasting the order of pyrene (PY) particles' exposure to N2O5-O-3 or O-3-N2O5 in a heterogeneous process were conducted. Additionally, PY particles were exposed to N2O5 (similar to 8 ppm) in the presence of O-3 (2.5-30 ppm) in a reaction chamber at ambient pressure and room temperature. Our results show that the phenomenon of blocking reaction sites may be ubiquitous on the surfaces of atmospheric aerosol particles, and the N2O5-initiated ionic electrophilic nitration may be promoted by NO3 radical-initiated heterogeneous reactions on the aerosol particle surface. We also found that the operative reaction mechanism strongly depends on the concentrations of the nitric oxides in the atmosphere. Our results provide an explanation as to why 2-nitropyrene (2-NPY), one of the most ubiquitous nitro-polyaromatic hydrocarbon pollutants that exists in both the gas and particle phases, was not observed in previous experiments on the heterogeneous reactions of PY and N2O5/NO3/NO2.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35745
Appears in Collections:大气污染控制中心_期刊论文

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Recommended Citation:
Zhang, Peng,Sun, Wanqi,Yang, Bo,et al. Effect of the blocked-sites phenomenon on the heterogeneous reaction of pyrene with N2O5/NO3/NO2[J]. RSC ADVANCES,2016,6(13):10358-10364.
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