Emerging investigator series: enhanced peroxidase-like activity and improved antibacterial performance of palladium nanosheets by an alginate-corona
文献类型：期刊论文
| 作者 | Ma, Minghao; Wang, Ruixia; Xu, Lining; Du, Jingjing; Xu, Ming; Liu, Sijin |
| 刊名 | ENVIRONMENTAL SCIENCE-NANO
 |
| 出版日期 | 2021-10-09 |
| 卷号 | 55期号:22页码:15063-15071 |
| 关键词 | air pollution H2O2 flow tube CDOMs photooxidation DFT |
| ISSN号 | 0013-936X |
| 英文摘要 | Atmospheric hydrogen peroxide (H2O2), as an important oxidant, plays a key role in atmospheric sulfate formation, affecting the global radiation budget and causing acid rain deposition. The disproportionation reactions of hydroperoxyl radicals (HO2) in both gas and aqueous phases have long been considered as dominant sources for atmospheric H2O2. However, these known sources cannot explain the significant formation of H2O2 in polluted areas under the conditions of high NO levels and low ambient relative humidity (RH). Here, we show that under relatively dry conditions during daytime, atmospheric fine particles directly produce abundant gas-phase H2O2. The formation of H2O2 is verified to be by a reaction between the particle surface -OH group and HO2 radicals formed by photooxidation of chromophoric dissolved organic matters (CDOMs), which is slightly influenced by the presence of high NO levels but remarkably accelerated by water vapor and O-2. In contrast to aqueous-phase chemistry, transition metal ions (TMIs) are found to significantly suppress H2O2 formation from the atmospheric fine particles. The H2O2 formed from relatively dry particles can be directly involved in in situ SO2 oxidation, leading to sulfate formation. As CDOMs are ubiquitous in atmospheric fine particles, their daytime photochemistry is expected to play important roles in formation of H2O2 and sulfate worldwide. |
| 源URL | [https://ir.rcees.ac.cn/handle/311016/46801]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Environm, Hangzhou Inst Adv Study, Hangzhou 310024, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, Minghao,Wang, Ruixia,Xu, Lining,et al. Emerging investigator series: enhanced peroxidase-like activity and improved antibacterial performance of palladium nanosheets by an alginate-corona[J]. ENVIRONMENTAL SCIENCE-NANO,2021,55(22):15063-15071. |
| APA | Ma, Minghao,Wang, Ruixia,Xu, Lining,Du, Jingjing,Xu, Ming,&Liu, Sijin.(2021).Emerging investigator series: enhanced peroxidase-like activity and improved antibacterial performance of palladium nanosheets by an alginate-corona.ENVIRONMENTAL SCIENCE-NANO,55(22),15063-15071. |
| MLA | Ma, Minghao,et al."Emerging investigator series: enhanced peroxidase-like activity and improved antibacterial performance of palladium nanosheets by an alginate-corona".ENVIRONMENTAL SCIENCE-NANO 55.22(2021):15063-15071. |
入库方式： OAI收割
来源：生态环境研究中心
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