Bimetallic Ag鈥揂u Nanowires: Synthesis, Growth Mechanism, and Catalytic Properties
详细信息 查看全文
- 作者：Haitao Fu ; Xiaohong Yang ; Xuchuan Jiang ; Aibing Yu
- 刊名：Langmuir
- 出版年：2013
- 出版时间：June 11, 2013
- 年：2013
- 卷：29
- 期：23
- 页码：7134-7142
- 全文大小：511K
- 年卷期：v.29,no.23(June 11, 2013)
- ISSN：1520-5827
文摘
Silver鈥揼old (Ag鈥揂u) bimetallic nanowires were controllably synthesized by a newly developed wet-chemical method at room temperature. The Ag nanowires and Au nanoparticles were sequentially formed by reduction with vanadium oxide (V2O3) nanoparticles so as to form Ag鈥揂u bimetal, in which the Ag nanowires show a diameter of 20 nm and length up to 10 渭m. A few unique features were noted in our new approach: it was rapid (within a few minutes), controllable in shape and size, reproducible, and there was no need for any surface modifiers. The formation and growth mechanisms of these Ag鈥揂u bimetallic nanostructures driven by lattice match and a unique reducing agent (V2O3) have been proposed in this study. Moreover, the application of such bimetallic nanoparticles for catalytic reduction of 4-nitrophenol to 4-aminophenol was performed, and they exhibit catalytic properties superior to those of the Ag nanowires, Au nanoparticles, and Ag鈥揚d bimetallic nanostructures prepared under the reported conditions. These Ag鈥揂u bimetallic nanoparticles have potential to be highly efficient catalysts for the reduction of 4-nitrophenol. This study may lead to new path for the generation of other bimetallic nanostructures with excellent catalytic efficiency.