【摘要】 通过在不同粒径的二氧化硅微球模板上进行化学镀银得到SiO₂@Ag粉体,并进一步在不同尺寸的SiO₂@Ag复合结构上沉积Cu₂O、Cu得核壳结构SiO₂@Ag@Cu₂O与SiO₂@Ag@Cu混合粉末复合颗粒。发现通过改变镀铜液的pH值与还原剂滴加速率等参数可以控制包覆表层的物相,当pH值低于10时,不会出现含有铜元素的沉积层;当pH值处于10¹1之间,且降低还原剂滴速有利于得到Cu₂O镀层;pH值提高至12且还原剂滴加速率增高则有利于在表面得到Cu单质包覆层。更多还原

【Abstract】 In this article,SiO₂@Ag@Cu and SiO₂@Ag@Cu₂O composite core-shell structure is synthesized by electroless plating a Cu₂O or Cu shell on the powder of SiO₂@Ag,where the basic SiO₂@Ag is fabricated through the silver plating on different sizes of silica templates.It is found that the changes of parameters like pH value and reducing agent addition rate can regulate and control the outmost shell phase:the Cu₂O shell is appreciable when pH maintains between 10-11 with lower reducing agent addition rate,while higher pH and addition rate of reducing agent will result in a shell mainly composed of Cu.更多还原