Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities
文献类型：期刊论文
| 作者 | Yu Zhang; Pengli Zhu; Gang Li; Wenzhao Wang; Liang Chen; Daoqiang Daniel Lu; Rong Sun; Feng Zhou; Chingping Wong |
| 刊名 | Nanoscale
 |
| 出版日期 | 2015 |
| 英文摘要 | Highly stable monodispersed nano Cu hydrosols were facilely prepared by an aqueous chemical reduction method through selecting copper hydroxide (Cu(OH)2) as the copper precursor, poly(acrylic acid) (PAA) and ethanol amine (EA) as the complexing agents, and hydrazine hydrate as the reducing agent. The size of the obtained Cu colloidal nanoparticles was controlled from 0.96 to 26.26 nm by adjusting the dosage of the copper precursor. Moreover, the highly stable nano Cu hydrosols could be easily concentrated and re-dispersed in water meanwhile maintaining good dispersibility. A model catalytic reaction of reducing p-nitrophenol with NaBH4 in the presence of nano Cu hydrosols with different sizes was performed to set up the relationship between the apparent kinetic rate constant (kapp) and the particle size of Cu catalysts. The experimental results indicate that the corresponding kapp showed an obvious size-dependency. Calculations revealed that kapp was directly proportional to the surface area of Cu catalyst nanoparticles, and also proportional to the reciprocal of the particle size based on the same mass of Cu catalysts. This relationship might be a universal principle for predicting and assessing the catalytic efficiency of Cu nanoparticles. The activation energy (Ea) of this catalytic reaction when using 0.96 nm Cu hydrosol as a catalyst was calculated to be 9.37 kJ mol−1, which is considered an extremely low potential barrier. In addition,the synthesized nano Cu hydrosols showed size-dependent antibacterial activities against Pseudomonas aeruginosa (P. aeruginosa) and the minimal inhibitory concentration of the optimal sample was lower than 5.82 μg L−1. |
| 收录类别 | SCI |
| 原文出处 | http://pubs.rsc.org/en/content/articlelanding/2015/nr/c5nr03414k#!divAbstract |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/6651]  |
| 专题 | 深圳先进技术研究院_集成所 |
| 作者单位 | Nanoscale |
| 推荐引用方式 GB/T 7714 | Yu Zhang,Pengli Zhu,Gang Li,et al. Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities[J]. Nanoscale,2015. |
| APA | Yu Zhang.,Pengli Zhu.,Gang Li.,Wenzhao Wang.,Liang Chen.,...&Chingping Wong.(2015).Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities.Nanoscale. |
| MLA | Yu Zhang,et al."Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities".Nanoscale (2015). |
入库方式： OAI收割
来源：深圳先进技术研究院
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