Influence of particle size on the aggregation behavior of nanoparticles: Role of structural hydration layer
文献类型：期刊论文
| 作者 | Sun, Hongyan; Jiao, Ruyuan ; An, Guangyu; Xu, Hui; Wang, Dongsheng
|
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2021-05 |
| 卷号 | 103页码:33-42 |
| 关键词 | Nanoparticles Particle size Aggregation rate coefficient Structural hydration layer Derjaguin, Landau, Verwey and Overbeek (DLVO) theory |
| ISSN号 | 1001-0742 |
| 英文摘要 | More and more attention has been paid to the aggregation behavior of nanoparticles, but little research has been done on the effect of particle size. Therefore, this study systematically evaluated the aggregation behavior of nano-silica particles with diameter 130-480 nm at different initial particle concentration, pH, ionic strength, and ionic valence of electrolytes. The modified Smoluchowski theory failed to describe the aggregation kinetics for nano-silica particles with diameters less than 190 nm. Besides, ionic strength, cation species and pH all affected fast aggregation rate coefficients of 130 nm nanoparticles. Through incorporating structural hydration force into the modified Smoluchowski theory, it is found that the reason for all the anomalous aggregation behavior was the different structural hydration layer thickness of nanoparticles with various sizes. The thickness decreased with increasing of particle size, and remained basically unchanged for particles larger than 190 nm. Only when the distance at primary minimum was twice the thickness of structural hydration layer, the structural hydration force dominated, leading to the higher stability of nanoparticles. This study clearly clarified the unique aggregation mechanism of nanoparticles with smaller size, which provided reference for predicting transport and fate of nanoparticles and could help facilitate the evaluation of their environment risks. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| WOS研究方向 | Environmental Sciences |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/45954]  |
| 专题 | 生态环境研究中心_环境水质学国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Aquat Chem, Beijing 100085, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Key Lab Drinking Water Sci & Technol, Beijing 100085, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Hongyan,Jiao, Ruyuan,An, Guangyu,et al. Influence of particle size on the aggregation behavior of nanoparticles: Role of structural hydration layer[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2021,103:33-42. |
| APA | Sun, Hongyan,Jiao, Ruyuan,An, Guangyu,Xu, Hui,&Wang, Dongsheng.(2021).Influence of particle size on the aggregation behavior of nanoparticles: Role of structural hydration layer.JOURNAL OF ENVIRONMENTAL SCIENCES,103,33-42. |
| MLA | Sun, Hongyan,et al."Influence of particle size on the aggregation behavior of nanoparticles: Role of structural hydration layer".JOURNAL OF ENVIRONMENTAL SCIENCES 103(2021):33-42. |
入库方式： OAI收割
来源：生态环境研究中心
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