Antimicrobial activity of silver loaded MnO2 nanomaterials with different crystal phases against Escherichia coli
文献类型：期刊论文
| 作者 | Wang, Lian; He, Hong; Zhang, Changbin; Sun, Li; Liu, Sijin; Wang, Shaoxin |
| 刊名 | JOURNAL OF ENVIRONMENTAL SCIENCES
 |
| 出版日期 | 2016-03-01 |
| 卷号 | 41期号:0页码:112-120 |
| 关键词 | Silver MnO2 Bactericidal activity Escherichia coli ROS |
| 英文摘要 | Silver-loaded MnO2 nanomaterials (Ag/MnO2), including Ag/alpha-MnO2, Ag/beta-MnO2, Ag/gamma-MnO2 and Ag/delta-MnO2 nanorods, were prepared with hydrothermal and impregnation methods. The bactericidal activities of four types of Ag/MnO2 nanomaterials against Escherichia coli were investigated and an inactivation mechanism involving Ag+ and reactive oxygen species (ROS) was also proposed. The bactericidal activities of Ag/MnO2 depended on the MnO2 crystal phase. Among these nanomaterials, Ag/beta-MnO2 showed the highest bactericidal activity. There was a 6-log decrease in E. coli survival number after treatment with Ag/beta-MnO2 for 120 min. The results of 5,5-dimethyl-1-pyrroline-N-oxide spin-trapping measurements by electron spin resonance indicate UOH and UO2 -formation with addition of Ag/beta-MnO2, Ag/gamma-MnO2 or Ag/delta-MnO2. The strongest peak of UOH appeared for Ag/beta-MnO2, while noUOH or UO2 signal was found over Ag/alpha-MnO2. Through analysis of electron spin resonance (ESR) and Ag+ elution results, it could be deduced that the toxicity of Ag+ eluted fromAg/MnO2 nanomaterials and ROS played the main roles during the bactericidal process. Silver showed the highest dispersion on the surface of beta-MnO2, which promoted ROS formation and the increase of bactericidal activity. Experimental results also indicated thatAg/MnO2 induced the production of intracellular ROS and disruption of the cell wall and cell membrane. (C) 2015 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V. |
| 收录类别 | SCI |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/35735]  |
| 专题 | 生态环境研究中心_大气污染控制中心 |
| 推荐引用方式 GB/T 7714 | Wang, Lian,He, Hong,Zhang, Changbin,et al. Antimicrobial activity of silver loaded MnO2 nanomaterials with different crystal phases against Escherichia coli[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2016,41(0):112-120. |
| APA | Wang, Lian,He, Hong,Zhang, Changbin,Sun, Li,Liu, Sijin,&Wang, Shaoxin.(2016).Antimicrobial activity of silver loaded MnO2 nanomaterials with different crystal phases against Escherichia coli.JOURNAL OF ENVIRONMENTAL SCIENCES,41(0),112-120. |
| MLA | Wang, Lian,et al."Antimicrobial activity of silver loaded MnO2 nanomaterials with different crystal phases against Escherichia coli".JOURNAL OF ENVIRONMENTAL SCIENCES 41.0(2016):112-120. |
入库方式： OAI收割
来源：生态环境研究中心
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