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Sunlight-Induced Reduction of Ionic Ag and Au to Metallic Nanoparticles by Dissolved Organic Matter
文献类型：期刊论文
| 作者 | Yin, Yongguang ; Liu, Jingfu ; Jiang, Guibin |
| 刊名 | Chemistry; Science & Technology - Other Topics; Materials Science
 |
| 出版日期 | 2012 |
| 卷号 | 6期号:9页码:7910-7919 |
| 关键词 | silver nanoparticles gold nanoparticles naturally occurring nanoparticles reduction dissolved organic matter superoxide |
| ISSN号 | 1936-0851 |
| 中文摘要 | Despite the possible occurrence of metal nanoparticles in the environment due to the discharge of engineered nanoparticles and the natural transformation of metal ions into metal nanoparticles, little is known about the transformation mechanism, fates, behaviors, and effects of these nanoparticles in the environment. Here, we show that dissolved organic matter (DOM) in environmental waters can mediate the reduction of ionic Ag and Au to their metallic nanoparticles under natural sunlight, suggesting that this process may be general for metals with high reduction potential. We demonstrated that the reduction was mediated by superoxide from photoirradiation of the phenol group in DOM, and the dissolved O-2 significantly enhanced the formation of Ag nanoparticles. These results imply that previous knowledge about O-2-induced dissolution and its effect on persistence of Ag nanoparticles should be reconsidered in a sunlit DOM-rich aqueous environment. This study can also shed light on understanding possible natural sources of Ag and Au nanoparticles in the aquatic environment, which is possibly critical in the supergene enrichment of Ag and Au. |
| WOS记录号 | WOS:000309040600039 |
| 公开日期 | 2014-11-27 |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/8081]  |
| 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 |
| 推荐引用方式 GB/T 7714 | Yin, Yongguang,Liu, Jingfu,Jiang, Guibin. Sunlight-Induced Reduction of Ionic Ag and Au to Metallic Nanoparticles by Dissolved Organic Matter[J]. Chemistry; Science & Technology - Other Topics; Materials Science,2012,6(9):7910-7919. |
| APA | Yin, Yongguang,Liu, Jingfu,&Jiang, Guibin.(2012).Sunlight-Induced Reduction of Ionic Ag and Au to Metallic Nanoparticles by Dissolved Organic Matter.Chemistry; Science & Technology - Other Topics; Materials Science,6(9),7910-7919. |
| MLA | Yin, Yongguang,et al."Sunlight-Induced Reduction of Ionic Ag and Au to Metallic Nanoparticles by Dissolved Organic Matter".Chemistry; Science & Technology - Other Topics; Materials Science 6.9(2012):7910-7919. |
入库方式： OAI收割
来源：生态环境研究中心
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