催化学报 ›› 2009, Vol. 30 ›› Issue (5): 447-452.

• 研究论文 • 上一篇    下一篇

磁场诱导合成一维金属镍线的形貌控制

张濛, 邓佳, 张明慧, 李伟   

  1. 南开大学化学学院新催化材料科学研究所, 天津市能源材料化学重点实验室, 天津 300071
  • 出版日期:2009-05-25 发布日期:2013-02-05

Shape-Controlled Synthesis of Nickel Wires Using an External Magnetic Field

ZHANG Meng, DENG Jia, ZHANG Minghui, LI Wei*   

  1. Institute of New Catalytic Materials Science, College of Chemistry, Tianjin Key Lab of Energy Material Chemistry, Nankai University, Tian-jin 300071, China
  • Online:2009-05-25 Published:2013-02-05

摘要: 以镍盐与水合肼为起始原料, 采用外加磁场辅助的水热法合成了表面具有纳米级刺状结构的一维金属镍线. 向体系中引入十六烷基三甲基溴化铵 (CTAB) 作为包裹剂, 可以合成表面光滑的金属镍线. 对比大块镍, 金属镍线的矫顽力得到了显著的增强. 研究结果表明, 外加磁场是线状结构形成的关键, 而在镍核表面的 CTAB 吸附是控制表面形貌的重要因素. 以甲基异丁基甲酮加氢制备甲基异丁基甲醇为探针反应, 考察了所合成材料的加氢催化性能. 结果表明, 金属镍材料的一维结构与表面的纳米级刺状结构均有助于提高镍基催化剂的加氢催化活性.

关键词: 镍, 形貌控制, 水热合成, 矫顽力, 催化加氢

Abstract: One-dimensional nickel wires were synthesized by a hydrothermal method assisted by an external magnetic field. The morphology of the obtained nickel samples could be controlled by adding CTAB into the hydrothermal system as a coating agent. The as-prepared samples with different surface structures exhibit different magnetic properties and catalytic performance in hydrogenation.

Key words: nickel, shape control, hydrothermal synthesis, coercive force, catalytic hydrogenation