文献类型：期刊文献

英文题名：In-situ formation of silver nanoparticles stabilized by amphiphilic star-shaped copolymer and their catalytic application

作者：Huang, Xiujuan[1];Xiao, Yan[1];Zhang, Wei[1];Lang, Meidong[1]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat, Minist Educ,Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2012

卷号：258

期号：7

起止页码：2655

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20120214675830);WOS:【SCI-EXPANDED(收录号:WOS:000299162300071)】；

基金：This research was supported by the Fundamental Research Funds for the Central Universities (WD0913008, WD1014017), "Shu Guang" Project of Shanghai Municipal Education Commission, the Natural Science Foundation of Shanghai (11ZR1409200), the National Natural Science Foundation of China (51103041), Shanghai Leading Academic Discipline Project (B502), and Shanghai Key Laboratory Project (08DZ2230500).

语种：英文

外文关键词：Silver nanoparticles; Star-shaped copolymers; Coordination reduction; Nanoreactors; Catalytic activity

摘要：Silver nanoparticles (Ag NPs) were prepared via in situ reduction of silver nitrate (AgNO3) using polymeric micelles as nanoreactors without any additional reductant. The micelles were constructed from the amphiphilic star-shaped copolymer composed of poly(epsilon-caprolactone) (PCL) segment, 2-(dimethylamino) ethyl methacrylate (DMAEMA or DMA) units and oligo(ethylene glycol) monomethyl ether methacrylate (OEGMA or OEG) units. The Ag NPs stabilized by those star-shaped copolymers were characterized using UV-vis spectrum, DLS, TEM and FTIR. It confirmed that PDMAEMA exhibited the reducing property unless pH was above 7. The Ag NPs were sphere-like with a diameter of 10-20 nm, which was independent of the architecture of the copolymer and AgNO3 concentration. Furthermore, the catalytic activity of these Ag NPs was investigated by monitoring the reduction of p-nitrophenol (4-NP) by NaBH4. The result showed that the Ag NPs formed by coordination reduction can be effectively applied in catalytic reaction. (C) 2011 Elsevier B. V. All rights reserved.