摘要
通过ＵＶ、ＸＲＤ和化学分析方法研究了联氨在同Ｆｅ（ＩＩ） 、Ｃｏ（ＩＩ） 、Ｎｉ（ＩＩ） 反应制备金属纳米粉的行为． 认为在乙醇－ 水体系中， 水合肼还原Ｃｏ（ＩＩ） 、Ｎｉ（ＩＩ） 的反应是经过配合催化， 还原Ｆｅ（ＩＩ） 的反应是经过表面催化和高压诱导． 用水合肼对钴、镍纳米粉进行铁的包覆， 以及有钴、镍存在下的岐化分解都是表面催化．
By studying UV visible spectrum, XRD patterns and chemical analysis, the behavior of hydrazine hydrate in the preparation of metallic nanopowders of Fe, Co and Ni was researched. It is believed that in an alcohol aqueous system, the reduction of Co(II) and Ni(II) to metallic cobalt and nickel by hydrazine hydrate is a coordinating catalysis procedure, while the Fe(II) reduced by hydrazine hydrate is by surface catalysis or high pressure induction. The coating of iron reduced by hydrazine hydrate on metallic cobalt or nickel nanopowders and self redox reaction of hydrazine hydrate under the existence of metallic cobalt or nickel are both surface catalyst reactions.
关键词
铁
钴
镍
联氨
催化
金属纳米粉
制备
hydrazine hydrate, iron, cobalt, nickel, reduce, catalysis
