用化学还原法制备了银包覆聚苯乙烯(PS)微球结构,通过垂直沉积法排列出具有密堆积结构的PS-Ag蛋白石模板,然后采用溶胶-凝胶法渗透 TiO2,最后焙烧处理除去 PS,制备出了规整的核壳结构TiO2/Ag反蛋白石。采用扫描电镜、透射电镜和 X射线衍射对该样品进行了分析。结果表明,PS球表面包覆的为纳米尺度的金属 Ag；所制备的 PS/Ag 核壳微球蛋白石经过480℃、12h 焙烧处理后获得的核壳TiO2/Ag反蛋白石结构的单胞参数可以通过调节包覆银层的厚度来调变,即改变 AgNO3与PS球的质量比获得具有不同银包覆层厚度、不同单胞参数的三维蛋白石和反蛋白石结构。
Firstly,the polystyrene (PS)microspheres with silver shell were synthesized by chemical reduction method.Subsequently,PS/Ag core-shell opals template was prepared using vertical deposition method,then TiO2 infiltrated into opal template by sol-gel method.Finally the samples were calcinated to remove PS micro-spheres,leaving TiO2/Ag inverse opal.The samples were characterized and investigated by SEM,TEM and XRD.The results showed that the surface of PS microspheres was coated by nano-silver;the unit cell parame-ters of the obtained TiO2/Ag core-shell inverse opals after calcination at 480℃ for 12h can be controlled by ad-j usting the shell thickness of silver.In other words,PS/Ag microspheres with different shell thickness of sil-ver,three-dimensional opals and inverse opals structure with different unit cell parameters can be obtained only by tuning AgNO3/PS mass ratio.
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