全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

枝状Ag/Au双金属纳米材料的合成及表征

Keywords: 树枝状,纳米材料,Au/Ag合金

Full-Text   Cite this paper   Add to My Lib

Abstract:

利用Au离子与树枝状纳米Ag的置换反应,以聚乙烯吡咯烷酮(PVP)为表面活性剂,制备了树枝状Ag/Au双金属纳米材料.利用扫描电子显微镜、能量散射X-射线光谱、紫外可见光光谱仪对样品的形貌、成分进行了表征分析,研究了反应温度对产物的影响.结果表明,当反应温度为180℃,反应时间为30min时,可以得到形貌保持较好的纳米枝状结构.产物的UV-Vis光谱中只观察到一个位于单金属Ag和Au之间的吸收峰,表明形成了Au/Ag合金纳米结构.随着温度升高,置换速度加快,有利于Au的生成.

References

[1]  Corma A, Garcia H. Supported gold nanoparticles as catalysts for organic reactions[J]. Chem Soc Rev,2008,37:2096-2126.
[2]  Jana S, Ghosh S K, Nath S, et al. Synthesis of silver nanoshell-coated cationic polystyrene beads: a solid phase catalyst for the reduction of 4-nitrophenol[J]. Appl Catal:General,2006,A313:41-48.
[3]  Liu X, Dai Q, Austin L. A one-step homogeneous immunoassay for cancer biomarker detection using gold nanoparticle probes coupled with dynamic light scattering[J]. J Am Chem Soc,2008,130(9):2780-2782.
[4]  孟宪伟,唐芳琼,苟立,等. 纳米颗粒复合材料增强的葡萄糖生物传感器[J]. 化学通报,2001,6:365-367.
[5]  Lei Y Z, Zhao G H, Tong X L, et al. High electrocatalytic activity of Pt-Pd binary spherocrystals chemically assembled in vertically aligned TiO2 nanotubes[J]. Chem Phys Chem,2010,11:276-284.
[6]  Xu X L, Jia J B, Yang X R, et al. A templateless, surfactantless, simple electrochemical route to a dendritic gold nanostructure and its application to oxygen reduction[J]. Langmuir,2010,26,7627-7631.
[7]  宋李红,易清风. 树枝状银纳米颗粒的制备[J]. 广东化工,2012,5:1-2.
[8]  Watt J, Cheong S, Tilley R D. Ultrafast growth of highly branched Palladium nanostructures for catalysis[J]. ACS Nano,2010,4(1):396-402.
[9]  Chen J, Herricks T, Xia Y N. Polyol synthesis of platinum nanostructures: control of morphology through the manipulation of reduction kinetics[J]. Angew Chem Int Ed,2005,44:2589-2592.
[10]  易清风,李磊,宋李红,等. 松树枝状双金属Ag-Cu颗粒的制备与电活性[J]. 无机化学学报,2010,26(9):1600-1604.
[11]  Peng Z, Yang H. Synthesis and oxygen reduction electrocatalytic property of Pt-on-Pd bimetallic heteronanostructures[J]. J Am Chem Soc,2009,131:7542-7543.
[12]  Leslie A, Lu X M, Xia Y N. A comparative study of galvanic replacement reactions involving Ag nanocubes and AuCl-2 or AuCl-4[J]. Adv Mat,2008,20:2517-2522.
[13]  Lu X, Chen J, Xia Y N, et al. Galvanic replacement reaction: a simple and powerful route to hollow and porous metal nanostructures[J]. Nanoeng Nanosyst,2007,221(1):1-16.
[14]  金毅亮,姚建林,顾仁敖. Au/Ag合金溶胶与HAuCl4反应过程的紫外光谱研究[J]. 光谱学与光谱分析,2009,29(10):2815-2819.
[15]  Freeman R G, Hommer M B, Grabar K C, et al. Ag-clad Au nanoparticles: novel aggregation, optical, and surface-enhanced Raman scattering properties[J]. J Phys Chem,1996,100:718-724.
[16]  王梅,姚建林,顾仁敖. Au-Ag合金纳米粒子制备及其表面增强拉曼光谱研究[J]. 高等学校化学学报,2006,27(8):1518-1521.
[17]  Skrabalak S E, Chen J Y, Xia Y N, et al. Gold nanocages: synthesis, properties, and applications[J]. Accounts Chem Research,2008,41(12):1587-1595.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133