采用溶胶-凝胶法(Sol-gel)制备了不同形貌结构的纳米掺银复合颗粒.分析了掺银二氧化硅复合颗粒的形成机理,并采用透射电子显微镜(TEM)、扫描电子显微镜(SEM)、X射线衍射仪(XRD)、红外(FT-IR)及紫外可见(UV-Vis)光谱仪等手段对Ag/SiO_2复合颗粒的形貌结构进行了表征和分析.结果表明:复合颗粒(290 nm)尺寸均匀,近似球状,银颗粒(4 nm)均匀分布在二氧化硅表面,硅烷偶联剂KH-550影响了银粒子在复合颗粒中的分布状态,对Si-O-Si网络结构也有一定的影响,同时有效抑制了复合颗粒的团簇程度.
The silver-silica composite grains with different structures were prepared by Sol-gel technology. The formation mechanism was analyzed, the structures of composite grains were characterized by transmission electron microscope (TEM), scan electron microscope (SEM), X-ray diffraction (XRD),Fourier transform infrared spectrometer(FT-IR) and ultraviolet-visible spectroscopy(UV-Vis). The results indicated that the average size of composite grains(290 nm) was homogeneous and the form was similar to sphericity; and Ag grains(4 nm)which were linked on the surface of silica were also homogeneous distribution. In addition, the distribution of Ag grains on the surface of silica were affected by silane coupling agent KH-550, the network system of silica Si-O-Si was affected definitely by silane coupling agent KH-550 , which controled effectively the cluster degree of composite grains.
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