Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities | |
Department | 固体润滑国家重点实验室 |
Zhang, Yu1,2,3; Zhu, Pengli1; Li, Gang1; Wang, Wenzhao1; Chen, Liang1; Lu, Daoqiang Daniel1; Sun, Rong1; Zhou F(周峰)2![]() | |
2015 | |
Source Publication | Nanoscale
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ISSN | 2040-3364 |
Volume | 7Issue:32Pages:13775-13783 |
Abstract | 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. |
Subject Area | 材料科学与物理化学 |
DOI | 10.1039/c5nr03414k |
Funding Organization | the National Basic Research Program of China (973 Program) (2012CB933700-G);the Guangdong Innovative Research Team Program (no. 2011D052;KYPT20121228160843692);Shenzhen High Density Electronic Packaging and Device Assembly Key Laboratory (ZDSYS20140509174237196); the Shenzhen Basic Research Plan (JCYJ20140610152828685;GJHS20120702091802836) |
Indexed By | SCI |
If | 7.394 |
Language | 英语 |
Funding Project | 材料表面与界面行为研究组 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/18551 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Zhu, Pengli; Lu, Daoqiang Daniel |
Affiliation | 1.Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Shenzhen Coll Adv Technol, Shenzhen, Peoples R China 4.Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA 5.Chinese Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China |
Recommended Citation GB/T 7714 | Zhang, Yu,Zhu, Pengli,Li, Gang,et al. Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities[J]. Nanoscale,2015,7(32):13775-13783. |
APA | Zhang, Yu.,Zhu, Pengli.,Li, Gang.,Wang, Wenzhao.,Chen, Liang.,...&Wong, Chingping.(2015).Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities.Nanoscale,7(32),13775-13783. |
MLA | Zhang, Yu,et al."Highly stable and re-dispersible nano Cu hydrosols with sensitively size-dependent catalytic and antibacterial activities".Nanoscale 7.32(2015):13775-13783. |
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