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以硝酸锌为原料,分别采用沉淀法和燃烧法合成纳米氧化锌(n-ZnO)颗粒。采用X射线衍射仪、透射电子显微镜和紫外分光光度计对n-ZnO样品进行表征,并研究合成机理和样品紫外屏蔽性能。结果表明:用沉淀法获得的n-ZnO粒径较小,为20～40nm,颗粒分散均匀;用燃烧法制备的n-ZnO粒径为40～80nm。两种方法所制备的n-ZnO均属六方晶型,具有较强的紫外吸收能力,并且吸收出现蓝移,表现为量子尺寸效应。
Zinc nitrate was used as raw material to synthesize n-ZnO particles by precipitation method and combustion method respectively. The n-ZnO samples were characterized by X-ray diffraction, transmission electron microscopy and UV spectrophotometer. The mechanism of synthesis and UV shielding properties were also studied. The results show that the particle size of n-ZnO obtained by the precipitation method is small, ranging from 20 to 40 nm, and the particles are uniformly dispersed. The n-ZnO particle size prepared by the combustion method is 40 to 80 nm. The n-ZnO prepared by the two methods are all hexagonal, have strong ultraviolet absorption ability, and absorb blue shift, showing the quantum size effect.