高等学校化学学报

高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (7): 1223.

• 研究论文 • 上一篇    下一篇

β-PbO2纳米棒及Pb3O4纳米晶的制备与表征

庄京, 邓兆祥, 梁家和, 李亚栋   

  1. 清华大学化学系, 北京 100084
  • 收稿日期:2001-09-20 出版日期:2002-07-24 发布日期:2002-07-24
  • 通讯作者: 李亚栋(1964年出生),男,博士,教授,博士生导师,主要从事无机合成与纳米材料科学研究.
  • 基金资助:

    国家自然科学基金(批准号:20025102)

Synthesis and Characterization of β-PbO2Nanorods and Pb3O4Nanocrystallites

ZHUANG Jing, DENG Zhao-Xiang, LIANG Jia-He, LI Ya-Dong   

  1. Department of Chemistry, Tsinghua University, Beijing 100084, China
  • Received:2001-09-20 Online:2002-07-24 Published:2002-07-24

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摘要： 利用NaClO在碱性溶液中与Pb(Ac)2进行氧化反应直接合成出直径为10～20nm、长度为400nm、长径比达20以上的纯相β-PbO2纳米棒.对所得β-PbO2在420℃下进行热解,得到晶粒尺寸为20nm左右的Pb3O4.对液相氧化反应的温度、时间、氧化剂浓度、pH等因素的影响进行了详细研究,获得了最佳合成反应条件.所得产物利用粉末X射线衍射和透射电子显微镜分析进行了表征.

关键词: 纳米棒, 纳米晶, &beta, -PbO2, Pb3O4

Abstract: Phase pure β-PbO2nanorods with diameter of 10-20 nm and length up to 400 nm with an aspect ratio >20 were synthesized through direct oxidation of Pb(Ac)2by NaClOunder alkaline conditions. The obtained β-PbO2nanorods were then decomposed at 420 ℃ to produce Pb3O4nanocrystals with crystallite size ～20 nm. The reaction conditions were optimized on the basis of detailed investigations of the influences of reaction temperature, time, concentraion of NaClO, and pHon the products. Powder X-ray diffraction(XRD) and transmission electron microscope were employed for the characterization of the structure, compositions and morphology of the obtained nanocrystalline products.

Key words: Nanorod, Nanocrystal, β－PbO2, Pb3O4

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