纳米银粒子在高岭石层间的合成与表征

以高岭石-二甲基亚砜作为前驱体,用硝酸银层间取代,以高岭石的层间作为反应器来控制银粒子的大小,采用还原剂水合肼还原出单质银,制备高岭石-纳米银复合物。由红外光谱研究可知,插层作用破坏了层间氢键,二甲基亚砜与高岭石的外羟基形成了氢键,银的插入使得高岭石在2θ=38.1108～38.3942°之间出现了一个陡峭Ag(111)的衍射峰。TEM研究表明,Ag已进入层间,但粒度分布不均匀。

Synthesis and Characterization of Silver Nano-particles in Interlamellar Space of Kaolinite Composites

Useing the kaolinite-dimethyl sulfoxide (DMSO) to be the precursor, then it was substituted by silver nitrate in the interlamination of kaolinite.The kaolinite interlamination was used as a reactor to control the silver particle size.The reductant hydrazine hydrate was used to reduce sliver for preparing kaolinite-sliver intercalation complexe. Then the intercalation complexe was charactered by infrared spectrum, it was seen that the intercalation performance destructed the interlayer hydrogen bond. DMSO formed the hydrogen bond with inner surface hydroxyl groups of kaolinite. Inserting of silver made the sharp diffraction peak of the Ag(111)at 2θ=38.110 8～38.394 2°. TEM characterization indicated that the silver had already intercalated into the layers of kaolinite,but the particle size distributed nonuniformity.