摘要
为防止纳米粒子发生团聚现象和沉降现象,在聚乙二醇的存在下,不加还原剂,微波辐射氯化钯水溶液,合成了纳米钯粒子。采用紫外可见吸收光谱、X射线衍射、透射电镜等技术对钯粒子的形貌进行了研究,考察了微波时间和聚乙二醇用量对纳米钯粒子形态的影响。结果表明,m(PEG400):m(PdCl2)=30时,微波功率300 W下反应30 min,得到单分散的纳米钯粒子,尺寸在10nm左右。而且纳米钯的存在降低了基体聚乙二醇400的热稳定性。
Nano-Pd particles were prepared by microwave radiation in the palladium chloride solution by addi-tion of polyethylene glycol （ PEG ） .Nano -Pd particles were studied by transmission electron microscopy （ TEM） ,ultraviolet visible （ UV -Vis ） and X -Ray Diffraction （ XRD ） .Influence of amount and molecular weight of PEG on the morphology of nano-Pd particles was investigated.The results showed that the monodis-persed nano-Pd particles with a diameter of 10nm were obtained when the mass ratio of PEG400/PdCl2 is 30∶1, microwave power is 300 W, and reaction time is 30min.The thermal stability of the matrix PEG400 decreases when nano-Pd occurring.
出处
《安徽理工大学学报（自然科学版）》
CAS
2014年第3期12-15,28,共5页
Journal of Anhui University of Science and Technology:Natural Science
基金
国家自然基金资助项目(51173002)
关键词
聚乙二醇
纳米钯
微波
热稳定性
polyethylene glycol
nano-Pd particles
micromave radiation
thermal stability
