采用光化学还原法在大颗粒负载型SiO2表面上成功制备了负载型Ag@SiO2复合纳米粒子,利用透射电子显微镜、X射线衍射和紫外-可见分光光度计等分析方法对样品进行了表征.结果表明,球形银纳米粒子均匀分散于球形SiO2复合粒子表面,复合粒子粒径在150～180 nm,且颗粒均一、分散性好.银粒子的粒径在10～15 nm,样品中银粒子具有良好的面心立方结构,晶型很好,银粒子的等离子共振吸收的最大峰位于474 nm.
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