高等学校化学学报

高等学校化学学报

• 研究论文 • 上一篇    下一篇

纳米四氧化三铁表面酸碱性质研究

孙中溪; 郭淑云   

  1. 济南大学化学化工学院, 济南 250022
  • 收稿日期:2006-01-26 修回日期:1900-01-01 出版日期:2006-07-10 发布日期:2006-07-10
  • 通讯作者: 孙中溪

Surface Acid-base Properties of Magnetite Nanoparticles

SUN Zhong-Xi*; GUO Shu-Yun   

  1. School of Chemistry & Chemical Engineering, Jinan University, Jinan 250022,
    China
  • Received:2006-01-26 Revised:1900-01-01 Online:2006-07-10 Published:2006-07-10
  • Contact: SUN Zhong-Xi

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被引次数

72

摘要： 制备了纳米Fe3O4, 并对其进行了表征和表面酸碱行为研究. 实验结果表明, Fe3O4表面在水溶液中有非常明显的酸碱性质. 随着纳米Fe3O4加入量的增多, 溶液pH缓冲能力增强, 二者之间成正比, 据此可定量地测定H+在纳米氧化铁表面的吸附量. 运用MEDUSA和WINSGW计算软件计算了表面组分在溶液中的分布， 并讨论了表面电荷对表面组分分布的影响.

关键词: Fe3O4纳米粒子, 表面酸碱性质, Gran图

Abstract: In this paper, the synthesis and acid-base properties of magnetite nanoparticles were studied. The testing results show that the surface of the magnetite nanoparticles possessed an obvious acid-base property. With increasing the amount of magnetite nanoparticles in the suspension, the pH buffer capacity of solution increased dramatically. There is a proportional relationship between the amount of magnetite nanoparticles added and solution pH buffer capacity. According to this, the adsorption quantity of proton on the surfaces can be determined. The effect of surface charge on the surface speciation was discussed by using computer program MEDUSA and WINSGW to establish the distribution diagram in magnetite suspension.

Key words: Fe3O4 nanoparticles, Surface acid-base properties, Gran plot

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