Photochemical Synthesis and Characterization of Core-Shell Gold/Palladium Bimetallic Composite Nanoparticles

摘要：

The bimetallic nanoparticles with an Au core/Pd shell composite structure were synthesized in PEG-acetone solution by a photochemical reduction, using the method of simultaneous reduction of Au(III) and Pd(II) ions and Au seeding growth in the presence of Pd(II), respectively. The optical property of the composite nanoparticles was studied in the range of the molar ratio of Au:Pd from 4:1 to 1:4. Based on the characterizations by UV-Vis, XPS and TEM, an Au core/Pd shell nanostructure was confirmed and the size of bimetallic nanoparticles obtained by two approaches is between 5.6～4.6 nm and 4.6～6.2 nm, respectively. The different changing tendency of the composite particle size with a decrease of Au:Pd molar ratio in two photochemical reduction processes was explained. The mechanism of forming Au core/Pd shell composite nanoparticles was discussed briefly.

关键词： Au-Pd Composite nanoparticles Photochemical synthesis Core/ shell structure

作者: 董颖男 董守安 唐春

作者单位: 昆明贵金属研究所,昆明 650106

会议类型: 国际会议

会议名称: 第六届中国国际纳米科技研讨会

会议地点: 成都

会议语种:英文

在线出版日期: 2007-11-19（万方平台首次上网日期，不代表论文的发表时间）