均匀沉淀法制备不同粒径的纳米氧化锌.pdf

2010 年 第 4 期 广 东 化 工 第 37 卷 总第 204 期 · 37 · 均匀沉淀法制备不同粒径的纳米氧化锌 王肖鹏，薛永强 (太原理工大学 应用化学系，山西 太原 030024) [摘 要] 由于纳米氧化锌的功能和用途不同，因而需要制备出不同平均粒径的纳米氧化锌。论文以六水硝酸锌为原料，尿素为沉淀剂，研究 了均匀沉淀法制备不同平均粒径纳米氧化锌的工艺条件，讨论了工艺条件对其粒径和产率的影响规律。结果表明：通过均匀沉淀法制备的纳米 氧化锌的前驱体为 Zn (OH) (CO ) ；制备的纳米氧化锌为六方晶系的球形颗粒，平均粒径为20 ～50 nm ；纳米氧化锌的产率随反应物浓度的增大、 5 6 3 2 反应温度的升高、反应配比(n 尿素/nZn 2+)的增大而增大；纳米氧化锌颗粒的平均粒径随反应物浓度的减小、反应温度和煅烧温度的降低而减小。 [关键词]纳米氧化锌；不同粒径；均匀沉淀；制备；产率 [中图分类号]TQ [文献标识码]A [文章编号]1007-1865(2010)04-0037-03 Preparation of Nano-ZnO with Different Sizes by Homogeneous Precipitation Wang Xiaopeng, Xue Yongqiang (Department of Applied Chemistry, Taiyuan University of Technology, Taiyuan 030024, China) Abstract: Because the application purposes of nano-ZnO are different and different average diameters of nano-ZnO is needed. In the paper, process conditions of homogeneous precipitation were investigated to prepare different average diameters of nano-ZnO by the reaction of the Zinc nitrate and urea. And the effects of process conditions on the diameters and yield of nano-ZnO were discussed. The results showed that: the precursor of nano-ZnO was Zn (OH) (CO ) ; the structure of 5 6 3 2 nano-ZnO was hexagonal system and approximative spherical and the average nano-particle diameters was from 20 nm to 50 nm; the yield of nano-ZnO increased respectively with the increasing of the concentrations of the reactants, with the reaction temperature and with the molar rate of urea to Zinc ion; and nano-ZnO particle size decreased respectively