摘要
本文采用激光蒸凝法 ,以 15 0WCWCO2 激光器为光源 ,金属Zn为靶材 ,成功地制备出了Zn和ZnO纳米粒子。初步研究了反应参数对纳米粒子性能的影响 ,并用X射线衍射、电子衍射、透射电镜、EDTA滴定分析等技术对纳米粒子的性能进行了表征。实验结果表明 ,制备工艺条件对形成的纳米粒子有一定的影响 ,反应压力和载气流量影响纳米粒子的形貌。不同的反应气氛制备的产物不同 ,在惰性气氛下产品纳米粒子是Zn和ZnO的混合物 ,粒径较大 (平均约为 6 0nm)且不均一 ,较大的粒子呈单一球形 ,分散性好 ,约为 12 0nm ;较小的粒子 ( 35nm)相互连接 ,分散性不好 ;而在氧气气氛下 ,所得的纳米粒子是纯ZnO ,粒子为针形 ,其长约为 75nm ,宽约为 10nm ,分散性也较好 ;在氢气气氛中得到较纯的Zn纳米粒子 ,粒径较小 (平均约为 2 3nm)且较均一 ,粒子呈单一球形 ,分散性好。
Zn/ZnO nanoparticles were prepared by Laser heating gas-evaporation method in this paper, with a 150W CW CO 2 laser as light source and Zinc as a target. The effects of process parameters on nanoparticles have been pilot studied. XRD, ED, TEM and EDTA Complexo- metrictitration, were used to characterize the samples. The experimental results showed that the process parameters such as reaction pressure, the sort and rate of airflow affected the sizes and crystal system of nanoparticles. The products were varied with reaction atmospheres. It was also discovered that Zn and ZnO nanoparticles' diameters were between 35nm and 120 nm in inert gases. While pure acicular ZnO nanoparticles, 75nm in length, and 10nm in width were acquired in the oxygen, and Zn nanoparticles were obtained in the hydrogen, whose diameters were about 23nm. This method is expected to have the possibility of wide applications in the industry in the future.
出处
《应用激光》
CSCD
北大核心
2003年第2期81-83,90,共4页
Applied Laser
基金
国家自然科学基金资助项目(批准号:2 99710 0 3)
河北省自然科学基金资助项目(批准号:5 0 2 4 0 3)
