磁场诱导合成一维金属镍线的形貌控制  

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

作　　者：张濛[1] 邓佳[1] 张明慧[1] 李伟[1] 

机构地区：[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　　处：《催化学报》2009年第5期447-452,共6页

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.One-dimensional （ID） nickel wires were synthesized by a magnetic field-assisted hydrothermal procedure. The 1D nickel wires had a spiky surface and were prepared using NiCl2-6H2O and N2H4·H2O. The morphology of the wires was controlled by cetyltrimethylammonium bromide （CTAB） as a coating agent. The coercive force of the samples was stronger than that of the bulk nickel because of the one dimension. The formation mechanism was discussed. The external magnetic field played an important role in forming the 1D structure, and the adsorption action of CTAB was critical to the different morphology of the surface. The catalytic performance was studied using the hydrogenation of methyl isobutyl ketone as the probe reaction. This indicated that the catalytic activity is related to the nanostructure of the surface and the dimensionality of the materials.

关 键 词：镍 形貌控制 水热合成 矫顽力 催化加氢 

分 类 号：TG146.15[一般工业技术—材料科学与工程]