| Diesel soot photooxidation enhances the heterogeneous formation of H2SO4 | |
Zhang, Peng; Chen, Tianzeng ; Ma, Qingxin; Chu, Biwu; Wang, Yonghong; Mu, Yujing; Yu, Yunbo; He, Hong
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| 2022-09-12 | |
| Source Publication | NATURE COMMUNICATIONS
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| Volume | 13Issue:1Pages:5364 |
| Abstract | Both field observation and experimental simulation have implied that black carbon or soot plays a remarkable role in the catalytic oxidation of SO2 for the formation of atmospheric sulfate. However, the catalytic mechanism remains ambiguous, especially that under light irradiation. Here we systematically investigate the heterogeneous conversion of SO2 on diesel soot or black carbon (DBC) under light irradiation. The experimental results show that the presence of DBC under light irradiation can significantly promote the heterogeneous conversion of SO2 to H2SO4, mainly through the heterogeneous reaction between SO2 and photo-induced OH radicals. The detected photo-chemical behaviors on DBC suggest that OH radical formation is closely related to the abstraction and transfer of electrons in DBC and the formation of reactive superoxide radical (center dot O-2(-)) as an intermediate. Our results extend the known sources of atmospheric H2SO4 and provide insight into the internal photochemical oxidation mechanism of SO2 on DBC. Potential source of H2SO4 remains unclear in the atmosphere. This work first demonstrates that the formation of photoinduced center dot OH radical can directly promote the heterogeneous conversion of SO2 to H2SO4 on real diesel soot under light irradiation, extending the known sources of atmospheric H2SO4. |
| Department | 大气环境与污染控制实验室 ; 大气环境与污染控制实验室 |
| Keyword | BLACK CARBON ORGANIC-CARBON SULFURIC-ACID MIXING STATE NITROUS-ACID SULFATE AEROSOL SO2 ABSORPTION MECHANISM |
| Document Type | 期刊论文 |
| Identifier | https://ir.rcees.ac.cn/handle/311016/47397 |
| Collection | 大气环境与污染控制实验室 |
| Affiliation | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Peng,Chen, Tianzeng,Ma, Qingxin,et al. Diesel soot photooxidation enhances the heterogeneous formation of H2SO4[J]. NATURE COMMUNICATIONS,2022,13(1):5364. |
| APA | Zhang, Peng.,Chen, Tianzeng.,Ma, Qingxin.,Chu, Biwu.,Wang, Yonghong.,...&He, Hong.(2022).Diesel soot photooxidation enhances the heterogeneous formation of H2SO4.NATURE COMMUNICATIONS,13(1),5364. |
| MLA | Zhang, Peng,et al."Diesel soot photooxidation enhances the heterogeneous formation of H2SO4".NATURE COMMUNICATIONS 13.1(2022):5364. |
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| Diesel soot photooxi（1600KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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