在线阅读 --自然科学版 2005年3期《红外光谱技术在铁氧化物形成研究中的应用》
红外光谱技术在铁氧化物形成研究中的应用--[在线阅读]
刘辉1,2, 李平1,2, 魏雨1, 孙予罕1
1. 中国科学院煤炭化学研究所 山西太原 030001;
2. 河北师范大学化学学院 河北石家庄 050016
起止页码: 272--276页
DOI:
摘要
以红外光谱(IR)和X射线衍射(XRD)为主要表征手段,研究了在中性环境中微量Fe(Ⅱ)离子存在时氢氧化铁凝胶的相转化过程,获得了铁氧化物液相形成过程的重要信息.结果表明:微量Fe(Ⅱ)离子存在时氢氧化铁凝胶的相转化机制与没有Fe(Ⅱ)离子时不同,除生成αFeOOH和αFe2O3外,还生成了新的物种γFeOOH.γFeOOH的生成与温度、pH、阴离子种类等反应条件有关.

Application of IR Spectra in the Studies on the Formation of Iron (Hydr)oxides
LIU Hui1,2, LI Ping1,2, WEI Yu1, SUN Yu-han1
1. Institute of Coal Chemistry, Chinese Academy of Sciences, Shanxi Taiyuan 030001, China;
2. College of Chemistry, Hebei Normal University, Hebei Shijiazhuang 050016, China
Abstract:
The phase transformation of Fe(OH)3 gel in the presence of trace amounts of Fe(Ⅱ) ions was studied by using IR spectra and XRD.Some important information on the formation of iron (hydr)oxides in solution was obtained.The results show that the phase transformation mechanism of Fe(OH)3 gel in the presence of Fe(Ⅱ) ions is different from that in the absence of Fe(Ⅱ) ions.In the system with Fe(Ⅱ) ions,a new product γ-FeOOH forms besides α-FeOOH and α-Fe2O3.The results also show that the formation of γ-FeOOH is related to such factors as temperature,pH and the type of anions and so on.

收稿日期: 2004-9-20
基金项目: 河北省自然科学基金资助项目(501115)

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