物理化学学报 >> 2000, Vol. 16 >> Issue (07): 636-642.doi: 10.3866/PKU.WHXB20000712

研究论文 上一篇    下一篇

量子尺寸氧化锌微粒的制备与表征

张昕彤, 庄家骐, 任玉林, 徐金杰, 王德军, 白玉白, 李铁津, 姚建年   

  1. 中国科学院化学研究所,分子科学中心,北京 100080|吉林大学化学系,长春 130023
  • 收稿日期:1999-10-25 修回日期:2000-03-13 发布日期:2000-07-15
  • 通讯作者: 姚建年 E-mail:jnyao@ultral,ipc.ac.cn

Preparation and Characterization of Quantum-sized ZnO Nanoparticles

Zhang Xin-Tong, Zhuang Jia-Qi, Ren Yu-Lin, Xu Jin-Jie, Wang De-Jun, Bai Yu-Bai, Li Tie-Jin, Yao Jian-Nian   

  1. Institute of Photographic Chemistry,Chinese Academy of Science,Beijing 100080|Department of Chemsitry,Jilin University,Changchun 130023
  • Received:1999-10-25 Revised:2000-03-13 Published:2000-07-15
  • Contact: Yao Jian-Nian E-mail:jnyao@ultral,ipc.ac.cn

摘要:

用胶体化学方法制备了两种粒径分别为3nm(P1)和5nm(P2)的纤锌矿型氧化锌纳米微粒.利用多种表征手段对颗粒结构与光电性质进行表征. 两种微粒吸收谱带呈现不同程度的蓝移. 红外光谱研究表明 ,颗粒表面有乙酸分子吸附 ,乙酸分子与表面锌原子的配位方式以桥式配位为主. 表面光电压谱与热重分析研究表明 ,因制备条件不同 ,两种颗粒表面性质存在很大差异. 并结合制备条件对颗粒表面性质进行了分析.

关键词: 氧化锌, 纳米微粒, 制备, 表面性质

Abstract:

In the present work, we prepared two kinds of quantum-sized wurtzite ZnO particles whose average sizes were about 3 nm and 5 nm, respectively. The particles prepared were characterized by UV-Vis absorption spectra, IR spectra, XRD, TGA, DTA, transmission electron microscopy (TEM), surface photovoltage spectra (SPS) and electrical field induced surface photovoltage spectra (EFISPS) etc.. IR study showed that acetic acid molecules coordinated to the surface of ZnO in two modes, one is of the bridging type, and the other of the unidentate type. The latter is weaker. It was indicated by EFISPS that the two kinds of particles have very different surface properties because of their different sizes and preparation processes. We found that basic zinc acetate structure exists on the surface of 3 nm particles. While for 5 nm particles prepared by aging the 3 nm particles, that surface structure disappeared, but the particles were doped with lithium ions in the aging process. The above phenomena were explained by considering the hydrolytic chemistry of zinc acetate.

Key words: Zinc oxide, Nanoparticles, Preparation, Surface properties