摘要
以前驱物碱式碳酸锌热分解法制备ZnO纳米粒子 ;利用小角X射线散射 (SAXS)、广角X射线衍射(WAXD)技术 ,研究了原料、焙烧温度、焙烧时间和浸洗淋洗等条件对ZnO纳米粒子制备的影响 .结果表明 ,前驱物不淋洗有利于获得较小粒径的ZnO微晶 ,三种原料Zn(CH3COO) 2 、ZnCl2 和ZnSO4 ·7H2 O中 ,以Zn SO4 ·7H2 O为原料制备的晶粒最小 ;前驱物经焙烧、浸洗、乙醇淋洗后得到了晶粒分布均匀、纯相的ZnO纳米粒子 ,其晶粒尺寸随着焙烧温度、时间的增加 ,晶粒逐渐长大 ;随着晶粒尺寸的减小 ,ZnO的晶胞体积逐渐减小 ,而二类应变均方根值却逐渐增加 。
ZnO nanoparticles were prepared by thermal decomposition of the precursor, zinc carbonate hydroxide. The influences of preparation conditions such as raw materials, baked temperature, baked time and washing were investigated by small angle X-ray scattering and wide angle X-ray diffraction. The results indicate that not to wash the precursor is in favor of gaining smaller ZnO crystallite, and the size of ZnO grain is the smallest when ZnSO4·7H2O is used as raw material among three raw materials including Zn(CH3COO)2, ZnCl2 and ZnSO4·7H2O, The pure phase ZnO grains with a narrow size range are obtained after the precursor is calcined and washed with water and alcohol. The average size of ZnO grain increases gradually as the baked temperature and time increase. The unit cell volume of ZnO decreases gradually as the grain size decreases, while the second strain root-mean-square value increases showing that there are obvious surface effect and quantum size effect.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2001年第3期381-384,共4页
Journal of Harbin Institute of Technology
