纳米ZnO的沉淀法制备、表征及影响因素分析

无机材料学报

纳米ZnO的沉淀法制备、表征及影响因素分析

王金敏; 高濂

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

收稿日期:2002-09-28 修回日期:2002-11-08 出版日期:2003-11-20 网络出版日期:2003-11-20

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

WANG Jin-Min; GAO Lian

State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai Institute of Ceramics; Chinese Academy of Sciences; Shanghai; 200050 China

Received:2002-09-28 Revised:2002-11-08 Published:2003-11-20 Online:2003-11-20

摘要/Abstract

摘要： 用Zn(NO₃)₂·6H₂O对作原料、Na₂CO₃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64.12m²·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.

关键词: 纳米ZnO, 纤锌矿, 沉淀

Abstract: ZnO nanoparticles were synthesized by a precipitation method with Zn(NO₃)₂·6H₂O 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 253℃. XRD pattern of the powder indicates that the hexagonal wurtzite ZnO nanocrystals can be obtained when
the precursor calcinated at 300℃ for 2h. TEM micrographs show that the ZnO nanoparticles are well dispersed and the average particle size
is 15～20nm. The specific surface area of the obtained powder is 64.12m²·g^-1. There is no obvious difference whether to wash the precipitate by distilled water or ammonia
before to wash by ethanol.

Key words: ZnO nanoparticles, wurtzite, precipitation

中图分类号:

TB383

王金敏,高濂. 纳米ZnO的沉淀法制备、表征及影响因素分析[J]. 无机材料学报.

WANG Jin-Min,GAO Lian. Preparation, Characterization and Influential Parameters of ZnO Nanoparticles Synthesized by Precipitation Method[J]. Journal of Inorganic Materials.

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