W/O微乳液法制备铂纳米粒子

Preparation of Platinum Nanoparicles in W/O Microemulsion System

采用TritonX_10 0 /正戊醇 (质量比 1:1) /环己烷 /水W /O微乳液体系 ,成功制备了粒径为 10nm左右的Pt纳米粒子 .文中详细研究了影响Pt纳米粒子大小的各种因素 ,如表面活性剂种类、水和表面活性剂的摩尔比x0 、表面活性剂浓度、氯铂酸浓度、还原剂浓度以及 pH值等 .实验结果显示 ,Pt纳米粒子粒度随x0 、氯铂酸浓度增大而增大 ,而表面活性剂浓度 (大于临界胶团浓度cmc时 )、还原剂浓度 (过量很多时 )

Nanoscale Platinum particles were prepared in a W/O microemulsion system with composition of TritonX_100/n_C 5H 11 OH(weight ratio 1∶1)/C 6H 12 /H 2O. TEM images showed that the average particle diameter was 10 nm. The effects of some preparation conditions, such as surfactants categories, the molar ratio of water and surfactant( x 0), concentration of platinum acid, reductants and surfactants on the particle size, were investigated. It was shown that the particle size are positively proportional to x 0 and concentration of H 2PtCl 6, while it was little affected by concentration of surfactants, pH and reductants especially when the reductant concentration reached a saturated level.