Fe(OH)_3中微量金属离子对水热合成α-Fe_2O_3粒径的影响

Effect of Slight Amounts of Other Metal Ions in Fe(OH)_3 on Size of αFe_2O_3 Particles from Hydrothermal Synthesis

本文研究了某些金属离子（Ａｌ３＋、Ｍｎ２＋、Ｚｎ２＋、Ｃｒ２＋、Ｎｉ２＋、Ｃｏ２＋）及浓度对Ｆｅ（ＯＨ）３凝胶经水热法合成的αＦｅ２Ｏ３微粉颗粒大小的影响。研究结果发现，随着金属离子的浓度在一定范围内（０．０１０～０．０５０ｍｏｌ·Ｌ１）的增加，αＦｅ２Ｏ３颗粒有减小的趋势。其中加入Ｃｏ２＋（０．０５０ｍｏｌ·Ｌ１）、Ｍｎ２＋（０．１００ｍｏｌ·Ｌ１）可得到粒径为７５ｎｍ左右的αＦｅ２Ｏ３纳米微粉。

In this paper,the effect of some metal ions (Al3+、Mn2+、Zn2+、Cr2+、Ni2+、Co2+) and their concentration on size of ultrafine αFe2O3 particles from hydrothermal synthesis were studied. It was concluded that the particle diameter decreased with the increase of concentration of metal ions (0.010～0.050mol·L1). Nanometer size αFe2O3 of mean diameter 75nm was obtained by adding Co2+ in 0.050mol·L1 and Mn2+ in 0.100mol·L1.