分光光度法测定银铈氧化锌纳米复合材料中自由基含量

Determination of the Free radical Content in the Nano-Silver Cerium-Zinc Oxide by Spectrophotometry

利用直接沉淀技术,制备系列稀土掺杂纳米粒子,并且加入适当的表面活性剂聚丙烯酸钠(PAAS)以减小粒子之间的团聚,使得掺杂型纳米复合材料一系列优异的性能得到更好的发挥。文章应用分光光度法测定表面活性剂对纳米复合材料产生羟基自由基含量,从而间接的得出对其分散效果的影响。实验结果表明,表面活性剂可增加纳米粒子间的相互排斥作用,避免纳米粒子的团聚,提高纳米复合材料的分散性,增加其产生的羟基自由基含量还能改善或提高纳米粒子与其它物质的相容性。

Use direct precipitation technique, a series of rare earth doped nanoparticles was prepared and sodium polyacrylate （PAAS） was added to reduce the agglomeration between the particles, which resulted in a series of excellent properties of doped nanocomposites. In the paper, using spectrophotometry method surfactant hydroxyl radicals content on nano composites and indirect effects on its dispersion effect are obtained. Experimental results show that surfactant can increase the mutual repulsion of nanoparticles, avoid the agglomeration of nanoparticles, improve the dispersion of nano-composites and increase the content of hydroxyl radicals, which can improve or improve the compatibility of nanoparticles with other substances.