摘要
以高岭石-二甲基亚砜作为前驱体,PVP(聚乙烯吡咯烷酮)作分散剂,银氨络合物层间取代,以高岭石的层间作为反应器来控制银粒子的大小,制备出Ag/高岭石复合物。XRD表明,PVP对高岭石进行了表面改性,促进了纳米银粒子在层间的合成,出现明显的Ag的(111)、(200)、(220)、(311)4个衍射峰。根据小角度Ag的(001)衍射峰可知,高岭石层间距由0.716nm被扩大到4.53nm。TEM直观地表现了银在高岭石层间的形貌。
Silver particles were prepared by using the kaolinite - dimethyl sulfoxide as precursor and PVP as dispersant, and by interlaminar substitution of silver - ammino complex. The kaolinite interlamination was used as a reactor to control the silver particle size for the preparation of kaolinite - sliver intercalation complex. XRD pattern indicates that PVP modifies surface of the kaolinite and promotes synthesis of Ag particles in the kaolinite interlayers. Four diffraetion peaks of Ag were observed. The （001） peak of small angle X -ray diffraction showed that the basal spacing of kaolinite increases from 0. 716nm to 4.53nm. The morphology of Ag in the kaolinite interlamination was obsevered by TEM.
出处
《贵金属》
CAS
CSCD
2008年第4期7-10,共4页
Precious Metals
基金
国家自然科学基金资助项目(40672026)
关键词
金属材料
纳米银
高岭石
银氨络合物
PVP
表征
metal materials
silver nano - particles
kaolinite
silver - ammino complex
polyvinylpyrolidone
characterization
