化学学报 ›› 2004, Vol. 62 ›› Issue (16): 1557-1560. 上一篇    下一篇

研究简报

一种新的制备纳米γ-MnO2的方法——超声辐射氧化还原法

王文亮1, 李东升2,3, 王继武2, 薛岗林3, 史启祯3   

  1. 1. 陕西师范大学化学与材料科学学院, 西安, 710062;
    2. 延安大学化学化工学院, 延安, 716000;
    3. 西北大学化学系, 西安, 710069
  • 投稿日期:2003-07-17 修回日期:2004-04-16 发布日期:2014-02-17
  • 通讯作者: wlwang@snnu.edu.cn
  • 作者简介:王文亮E-mail:wlwang@snnu.edu.cn
  • 基金资助:
    陕西省自然科学基金(No.2002N21和陕西省物理无机化学重点实验室访问学者基金(Nos.01JF06,02JF05)资助项目.

A New Method for Preparing Nannsized γ-MnO2--Oxido-reduction Method under Ultrasonic Irradiation

WANG Wen-Liang1, LI Dong-Sheng2,3, WANG Ji-Wu2, XUE Gang-Lin3, SHI Qi-Zhen3   

  1. 1. School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062;
    2. Department of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000;
    3. Department of Chemistry, Northwest University, Xi'an 710069
  • Received:2003-07-17 Revised:2004-04-16 Published:2014-02-17

将超声辐射引入以KMnO4和MnSO4为原料的制备MnO2的氧化还原反应体系,借助XRD,ICP,XPS,TEM及IP等技术对产物进行了表征.结果表明,施加超声辐射对该反应体系有显著影响,可获得含K+量极低、分布均匀、粒径只有10 nm左右的近似球形γ-MnO2粉体,同时,证实未施加超声辐射的普通氧化还原沉淀法获得的锰氧化合物实际是KMn8O16,K+进入了确定的晶格位置,无法洗脱将其除去.

关键词: 超声辐射, 氧化还原, γ-MnO2, 纳米粉体, 催化活性

Using KMnO4 and MnSO4 as raw materials, two kinds of manganese oxides were prepared by oxido-reduction method under ultrasonic radiation and normal precipitation method, respectively.XRD, ICP, XPS, TEM, FT-IR and BET surface area measurement techniques were used to investigate the properties of the products.The results show that ultrasonic radiation has a great impact on reaction system, and it was found that the γ-MnO2 powder synthesized under ultrasonic radiation has an average diameter of 10 nm with sphere-shape and good dispersity, and the precipitation product obtained from normal oxidation-reduction reaction is KMn8O16, in which K+ exists in lattice of KMn8O16 and can not be removed by washing.

Key words: ultrasonic radiation, oxido-reduction, γ-MnO2, nanometer powder, catalytic activity