中文摘要：

柠檬酸钠做保护剂,光化学同时还原Au（Ⅲ）与Pt（Ⅳ）离子混合物合成Au核Pt壳纳米粒子。应用XPS、UV-V is、TEM等分析手段研究了Au-Pt纳米粒子的结构、形貌、化学状态等。结果表明：所合成的双金属纳米粒子为球形,具有Au核-Pt壳复合结构,平均粒径范围为8.1~5.1 nm。

英文摘要：

The Au/Pt core-shell nanoparticles were synthesized by photochemical simultaneous reduction of Au（Ⅲ） and Pt（Ⅳ） ions in the presence of sodium citrate as protect agent.The structure,morphology,chemical state and so on of the AuPt nanoparticles were characterized using XPS,UV-Vis and TEM.It was shown that the AuPt nanoparticles were spherical and had composite structure with Au core/Pt shell.The bimetallic nanoparticles sizes obtained are between 8.1~5.1nm.