高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (7): 1309.

• 研究论文 • 上一篇    下一篇

自催化还原制备微米和纳米级空心镍球的研究

邓意达, 赵凌, 刘曦, 沈彬, 刘磊, 胡文彬   

  1. 上海交通大学材料科学与工程学院金属基复合材料国家重点实验室, 上海200030
  • 收稿日期:2004-08-03 出版日期:2005-07-10 发布日期:2005-07-10
  • 通讯作者: 胡文彬(1966年出生),男,教授,博士生导师,从事表面技术与处理、先进功能材料和电磁材料研究.E-mail:wbhu@263.net E-mail:wbhu@263.net
  • 基金资助:

    国家自然科学基金(批准号:50474004);上海市科委纳米专项基金(批准号:0452nm046)资助.

Preparation of Micrometer-and Nanometer-sized Hollow Nickel Spheres by Autocatalytic Reduction

DENG Yi-Da, ZHAO Ling, LIU Xi, SHEN Bin, LIU Lei, HU Wen-Bin   

  1. State Key Laboratory of Metal Matrix Composites, College of Material Science and Engineering, Shanghai Jiaotong University, Shanghai 200030, China
  • Received:2004-08-03 Online:2005-07-10 Published:2005-07-10

摘要: 提出了一种新型的制备超细空心金属镍粉的方法.通过FESEM,TEM和XRD衍射对该制备方法进行了研究,并考察了有关工艺参数对产物粒径和粒度分布的影响.研究认为,通过在胶核表面发生自催化还原反应,形成金属镍壳,同时胶核发生自分解,最后可得到空心金属镍球.控制反应物浓度和NaOH的配比可得到粒径均匀的镍球;通过调整这两个参数可得到粒度在微米或纳米尺度的空心镍球.

关键词: 空心金属球, 微米和纳米级粉末, 自催化还原, 胶体模板

Abstract: A facile, novel and low-cost method for synthesizing hollow nickel spheres is reported in this paper. The hollow nickel spheres were characterized by field emission scanning electron microscopy, transmission electron microscope and X-ray powder diffraction. And the factors responsible for the control of the size distribution of the hollow spheres were discussed. The hollow nickel spheres was prepared by autocatalyzing the redox reaction around the colloidal particles. The concentration of reaction solution and molar ratio of Ni2+ to NaOH are important factors that affect the size distribution of the nickel spheres, and this two processing parameters can be regulated to synthesize micrometer and nanometer-sized hollow nickel spheres.

Key words: Hollow metal spheres, Micrometer- and nanometer-sized powder, Autocatalytic reduction, Colloid template

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