论文部分内容阅读
以三聚磷酸钠为保护剂,用焦性没食子酸还原硝酸银得到了纳米银溶胶。利用X射线衍射、紫外-可见吸收光谱、透射电镜、粒度分析对得到的纳米银溶胶进行了表征。结果表明,通过改变体系中保护剂的含量、反应时间和反应温度,制备了平均粒径分别为15、17、22、25、26nm的均匀球形纳米银;用不同的焦性没食子酸衍生物(没食子酸甲酯和没食子酸月桂酯)作还原剂分别得到了多形貌纳米银和平均粒径为7nm且尺寸均一的球形纳米银。
With sodium tripolyphosphate as a protective agent, pyrogallic acid was used to reduce the silver nitrate to obtain a nano silver sol. The obtained nano-silver sol was characterized by X-ray diffraction, UV-Vis absorption spectra, transmission electron microscopy and particle size analysis. The results showed that uniform spherical silver nanoparticles with average particle sizes of 15, 17, 22, 25 and 26 nm were prepared by changing the content of the protective agent, the reaction time and the reaction temperature. Different pyrogallic acid derivatives Methyl gallate and lauryl gallate) were used as reducing agents to obtain multi-morphology nano-silver and spherical nano-silver with an average particle size of 7 nm and uniform size, respectively.