纳米ZnO的沉淀法制备、表征及影响因素分析  

Preparation, Characterization and Influential Parameters of ZnO Nanoparticles Synthesized by Precipitation Method

作　　者：王金敏[1] 高濂[1] 

机构地区：[1]中国科学院上海硅酸盐研究所高性能陶瓷与超微结构国家重点实验室,上海200050

出　　处：《无机材料学报》2003年第6期1357-1361,共5页Journal of Inorganic Materials

基　　金：国家"973"项目

摘　　要：用Zn(NO_3)_2·6H_2O对作原料、Na_2CO_3作沉淀剂,制得了纳米ZnO粉体.用TG-DSC、XRD和TEM分别对前驱体和纳米ZnO粉体进行了表征.结果表明:所得前驱体在253℃左右分解为六方纤锌矿型纳米ZnO,颗粒大小约为15～20nm,粒径分布窄,基本无团聚,粉体的比表面积为64.12m^2·g^(-1)实验发现,当反应物浓度从2.0mol·L^(-1)减小至1.0、0.5mol·L^(-1)时,纳米ZnO粉体的粒径基本无变化,但颗粒间的团聚状态减轻;在用无水乙醇洗涤沉淀前,先用蒸馏水或稀氨水清洗对得到的纳米ZnO粉体的团聚状态没有明显的区别.ZnO nanoparticles were synthesized by a precipitation method with Zn(NO3)(2).6H(2)O as the starting material and Na2CO3 as the precipitant. When the concentration of the reactants reduced from 2.0 to 0.5mol.L-1, the particle size hardly changed but the agglomeration was weaker. TG-DSC curves of the precursor show that the precursor decomposes at about 253degreesC. XRD pattern of the powder indicates that the hexagonal wurtzite ZnO nanocrystals can be obtained when the precursor calcinated at 300degreesC for 2h. TEM micrographs show that the ZnO nanoparticles are well dispersed and the average particle size is 15similar to20nm. The specific surface area of the obtained powder is 64.12m(2).g(-1). There is no obvious difference whether to wash the precipitate by distilled water or ammonia before to wash by ethanol.

关 键 词：纳米ZNO 纤锌矿 沉淀 

分 类 号：TB383[一般工业技术—材料科学与工程]