【摘要】 本文通过共沉淀与油包水微乳液结合的方法制备了具有3～4 nm Au-FeO_x核和微孔SiO₂壳的核壳纳米结构Au-FeO_x@SiO₂。通过TGA证明了该纳米颗粒的最佳煅烧温度为550℃,并且结合TEM图考察了不同合成条件对纳米颗粒形貌的影响。XRD表征结果证明,Au-FeO_x@SiO₂核壳纳米颗粒中的FeO_x以无定形的形式存在,随着FeO_x含量的增多,Au的结晶度逐渐降低。更多还原

【Abstract】 The core-shell nanostructure Au-FeO_x@SiO₂ with 3 ～ 4 nm Au-FeO_x core and microporous SiO₂ shell was prepared by co-precipitation combined with water-in-oil microemulsion. The optimum calcination temperature of the nanoparticles was 550℃ by TGA, and the effects of different synthesis conditions on the morphology of the nanoparticles were investigated by TEM. XRD characterization results show that FeO_x in the Au-FeO_x@SiO₂ core-shell nanoparticles exists in an amorphous form. And as the FeO_x content increases, the crystallinity of Au gradually decreases.更多还原