无机材料学报

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机械化学法合成纳米ZnO粉体

林元华1; 翟俊宜1; 王海峰2; 蔡宁1; 南策文1   

  1. 1. 清华大学材料科学与工程系新型陶瓷与精细工艺国家重点实验室, 北京 100084; 2. 清华大学化学系, 北京 100084
  • 收稿日期:2002-04-10 修回日期:2002-06-03 出版日期:2003-05-20 网络出版日期:2003-05-20

Preparation and Characterization of Nanostructured ZnO Particles by Mechanochemical Processing

LIN Yuan-Hua1; ZHAI Jun-Yi1; WANG Hai-Feng2; CAI Ning1; NAN Ce-Wen1   

  1. 1. State Key Laboratory of New Ceramics and Fine Processing; Department of Materials Science and Engineering; Tsinghua University; Beijing 100084; China; 2. Department of Chemistry; Beijing 100084, China
  • Received:2002-04-10 Revised:2002-06-03 Published:2003-05-20 Online:2003-05-20

摘要: 利用机械化学法合成了单相ZnO粉体,XRD分析结果表明,ZnSO4/NaOH(mol比)在1/2.1~1/3.0之间均可合成ZnO粒子,ZnO产率在ZnSO4/NaOH为1/2.5时最大,TEM分析表明,ZnO粒子的粒径在40~80nm范围,对于反应机理,认为是固-固反应中放出的大量的热,使Zn(OH)2直接转化为ZnO粒子,光吸收性能表明,纳米ZnO粉体的紫外吸收性能(200~400nm)较普通ZnO粉体强得多。

关键词: 机械化学法, 纳米ZnO, 光吸收

Abstract: ZnO nanoparticles were synthesized by the mechanochemical processing. XRD patterns indicate all products are
single ZnO phase while ZnSO4/NaOH(mol ratio)is in the range from 1/2.1 to 1/3.0, and ZnO yield will obtain the maximum when ZnSO4/NaOH(mol ratio) is 1/2.5. TEM micrographs show the particle size of ZnO is about 40~80nm.
The heat released by the solid-solid reaction of ZnSO_4 and NaOH makes the product of Zn(OH)2 tramsform directly to ZnO particles. The optical
absorptivity of ultraviolet (200~400nm) for nanometer ZnO is much better than that of normal ZnO powders.

Key words: mechanochemical reaction, ZnO nanoparticle, optical absorptivity

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