在柠檬酸盐溶液体系中金核@铂壳纳米粒子的光化学合成

摘要

In the sodium citrate solution systems containing double metal ions with different Au:Pt molar ratios and single Pt(IV) ions, Au core @ Pt shell nanoparticles were synthesized by the photochemical coreduction and Au seed growth method, respectively. By means of characterization of TEM, the change regularity of the composite nanoparticle sizes was studied in both methods. The surface chemical state of the composite nanoparticles and their structure were analyzed by X-ray photoelectron spectroscopy (XPS), confirming that Au@ Pt nanoparticles formed are core-shell structure.%在含有不同Au：Pt摩尔比的双金属离子和单一Pt(IV)离子的柠檬酸盐溶液体系中，分别利用光化学共还原和Au晶种生长法合成了Au核@Pt壳纳米粒子。借助于透射电子显微镜的表征，研究了在2种制备方法中复合纳米粒子的尺寸变化规律；利用X射线光电子能谱(XPS)分析了复合纳米粒子的表面化学态和它们的结构，证实形成的Au@Pt纳米粒子为核-壳结构。