物理化学学报 >> 2004, Vol. 20 >> Issue (08S): 902-905.doi: 10.3866/PKU.WHXB200408zk02

研究论文 上一篇    下一篇

纳米氧化锌的粒度控制与表征

张士成;李春和;李星国   

  1. 北京大学稀土材料化学及应用国家重点实验室,北京 100871; 北京科技大学材料科学与工程学院,北京 100083
  • 收稿日期:2003-05-16 修回日期:2004-01-10 发布日期:2004-08-15
  • 通讯作者: 李星国 E-mail:xgli@chem.pku.edu.cn

Size Control and Characterization of ZnO Nanoparticles

Zhang Shi-Cheng;Li Chun-He;Li Xing-Guo   

  1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijing 100871; School of Materials Science and Technology, University of Science and Technology Beijing, Beijing 100083
  • Received:2003-05-16 Revised:2004-01-10 Published:2004-08-15
  • Contact: Li Xing-Guo E-mail:xgli@chem.pku.edu.cn

摘要: 采用溶胶-凝胶法制备了粒度小于10 nm的ZnO纳米颗粒,用沉淀法制备了粒度大于10 nm的ZnO纳米颗粒.讨论了颗粒粒度的控制因素,得到不同粒度的产品.采用TEM、XRD、BET、UV-Vis等检测手段对不同粒度的ZnO纳米颗粒进行表征.结果表明:粒度小于10 nm的ZnO纳米颗粒,具有量子效应,随粒度减小,紫外可见光光谱蓝移;粒度大于10 nm的ZnO纳米颗粒,不具有量子效应,它们的禁带宽度与块体ZnO的禁带宽度相同,为3.2 eV,不同粒度的ZnO纳米颗粒紫外可见光光谱相同.

关键词: ZnO, 纳米颗粒, 溶胶-凝胶法, 沉淀法, 半导体颗粒

Abstract: ZnO nanoparticles with different size were prepared by using sol-gel and precipitation method. With particle size of 10~50 nm, they were prepared by using precipitation method, and particle size and size distribution were controlled by milling process of an intermediate product Zn5(CO3)2(OH)6. With particle size smaller than 10 nm, they were synthesized by using sol-gel method, and the size was adjusted by changing the reaction conditions, such as reaction temperature, reaction time, etc. The ZnO nanoparticles with different size were characterized by using TEM, XRD, BET, UV-Vis. From UV-Vis spectra, the quantum effects of ZnO nanoparticles smaller than 10 nm were found, i.e., the absorption onset showed blueshifts with the decrease of size, and the ZnO nanoparticles bigger than 10 nm did not show quantum effects, the absorption edge was about 387 nm, corresponding to the bulk band gap for ZnO of 3.2 eV.

Key words: ZnO, Nanoparticles, Sol-gel method, Precipitation, Semiconductor particles