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›› 2008, Vol. 8 ›› Issue (2): 389-393.

• 材料工程专栏 • 上一篇    下一篇

不同形貌ZnO纳米/微米晶粒的制备与光学特性

周利民 王一平 黄群武 刘峙嵘   

  1. 东华理工大学应用化学系 天津大学化工学院 天津大学化工学院 江西抚州东华理工大学应用化学系
  • 收稿日期:2007-08-31 修回日期:2007-10-16 出版日期:2008-04-20 发布日期:2008-04-20
  • 通讯作者: 周利民

Preparation and Optical Properties of ZnO Nano- and Micro-crystals with Different Morphologies

ZHOU Li-min WANG Yi-ping GUANG Qun-wu LIU Shi-rong   

  1. Department of Applied Chemistry, East China Institute of Technology Fuzhou School of Chemistry and Chemical Engineering, Tianjin University School of Chemistry and Chemical Engineering, Tianjin University Department of Applied Chemistry, East China Institute of Technology Fuzhou
  • Received:2007-08-31 Revised:2007-10-16 Online:2008-04-20 Published:2008-04-20
  • Contact: ZHOU Li-min

摘要: 利用溶剂热法合成了六方柱、刷状束、六方锥及反向双锥结构的ZnO纳米/微米晶粒,考察了不同溶剂及pH值对ZnO形貌的影响,并测试了ZnO的室温光学特性. X射线衍射表明,ZnO产物均为六角纤锌矿型晶体结构;扫描电镜和透射电镜分析结果表明,ZnO粒径100 nm~15 mm, 长150 nm~60 mm,不同溶剂组成及pH值时ZnO形貌差别明显;紫外-可见吸收谱表明,ZnO晶粒在波长375 nm处有很好的激子吸收;光致发光谱表明,pH 13.5时ZnO在385和505 nm处分别有较强的紫光发射峰和绿光发射峰,表明所制ZnO产物有良好的光学性能和晶体品质.

关键词: 溶剂热法, ZnO形貌, 光学特性

Abstract: ZnO nano- and micro-crystals with various morphologies including hexagonal columns, brush-like assemblies, hexagonal cones and inverted cone pairs were prepared by a solvothermal method. The effects of different solvents and pH levels on ZnO morphology were investigated. X-ray powder diffraction analysis indicated that all ZnO products had wurtzite crystal structure. The results of scanning electron microscopy and transmission electron microscopy showed that ZnO had the diameters in the range of 100 nm~15 mm and the lengths of 150 nm~60 mm. Moreover, ZnO morphology was greatly influenced by solvents as well as pH values. The UV-Vis absorbance spectra showed that ZnO crystal samples had the similar excitonic character with the absorption peak at 375 nm. The photoluminescence spectra showed a strong UV peak at 385 nm and a broad green emission peak at 505 nm, respecitively. These results indicated that ZnO products had excellent optical properties and high crystal quality.

Key words: solvothermal method, ZnO morphology, optical property

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