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Matijevic等曾报道在密闭静态环境下强迫水解酸化的铁盐溶液制备出几种形状单一的微米或亚微米级的均匀α-Fe_2O_3或β-FeOOH胶体粒子。类似的工作国内亦有报道。如粒子尺寸减小到纳米量级,则体系兼有表面效应、体积效应和特殊的光学性质。我们尝试用强迫水解法制备粒径几十纳米的球形或立方形的α-Fe_2O_3均分散胶体粒子,结果获得成功。
Matijevic et al. Have reported that forcibly hydrolyzed acidified iron salt solution in confined and static environment to prepare several uniform α-Fe 2 O 3 or β-FeOOH colloidal particles with a single shape of micron or submicron. Similar work has also been reported in China. If the particle size is reduced to the order of nanometers, the system combines surface effects, volumetric effects and special optical properties. We try to use forced hydrolysis method to prepare spherical or cubic α-Fe_2O_3 average dispersed colloidal particles with a particle size of tens of nanometers, the result is successful.