EDTA作用下可见光诱导合成γ-FeOOH的探讨

Study on Preparation of γ-FeOOH by Visible Light-induced in the Presence of EDTA

本文以FeSO4为原料，添加微量EDTA可见光诱导，空气氧化Fe（OH）2悬浮液，室温（20℃）制备了γ-FeOOH，探讨了各种因素对产物的影响。结果表明：用NaOH作沉淀剂，pH值为8．6，在EDTA作用下可见光诱导有利于低晶γ-FeOOH的生成；pH值在8．0～8．6范围内，随pH值的降低，产物γ-FeOOH的晶化度逐渐提高；用NH3·H2O作沉淀剂，可得到粒径较大的筏状γ-FeOOH。

This paper described the preparation of γ-FeOOH by air oxidation of Fe （OH）2 under irradiation by visible light in the presence of trace EDTA using FeSO4 as the raw material and discussed some factors for the products. The results show that if used NaOH as the precipitator, when pH = 8.6, by visible light in the presence of trace EDTA , the product was low crystalline γ-FeOOH; when the pH value decreased （pH = 8.0-8.6） ,the crystalline of the product γ-FeOOH increased; if used NH3 · H20 as the precipitator, we could gain raft-like γ-FeOOH with the larger particle diameter.