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中文摘要：
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。
英文摘要：
Nano-sized zinc oxide（n-ZnO） particles were synthesized by precipitation method and combustion technology using zinc nitrate as raw materials.The as-synthesized samples were characterized by X-ray diffraction,transmission electron microscope,and ultraviolet（UV） spectrometer.The synthetic mechanism and UV-shielding properties were also investigated.The results show that samples prepared by the precipitation method have a smaller particle size ranging from 20 nm to 40 nm than those synthesized by the combustion technology with particle size of 40-80 nm.In addition,n-ZnO particles prepared by the precipitation method also have a uniform dispersion.The samples prepared by two methods are all assigned to the hexagonal wurtzite structure having strong absorption performance in ultraviolet region,and absorption peaks of the samples appear blue-shift,showing quantum size effects.
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