Effect of Ferrihydrite Sub-microstructure on Its Reactivity

被引：2

作者：

Ma Miao-Rui ^{[1
]}

Yang Li-Juan ^{[1
]}

Liu Qian ^{[1
]}

Liu Hui ^{[1
,2
]}

Wei Yu ^{[1
,2
]}

机构：

[1] Hebei Normal Univ, Coll Chem & Mat Sci, Shijiazhuang 050016, Peoples R China

[2] Key Lab Inorgan Nanomat Hebei Prov, Shijiazhuang 050016, Peoples R China

来源：

ACTA PHYSICO-CHIMICA SINICA | 2008年 / 24卷 / 12期

关键词：

Ferrihydrite; Sub-microstructure; Hematite; Reactivity;

D O I：

10.3866/PKU.WHXB20081222

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ferrihydrite was prepared by three procedures using Fe(III) as a raw material and NaOH as a precipitant. X-ray diffraction (XRD), infrared (IR) spectroscopy, differential thermal analysis (DTA), and kinetic dissolution in an acidic medium were employed to characterize the ferrihydrite synthesized by different methods. The effect of ferrihydrite sub-microstructure on its reactivity was investigated. The results showed that the sub-microstructure and the reactivity of ferrihydrite were related to the different preparation procedures. The structure of ferrihydrite prepared by adding Fe(III) and NaOH solutions to water simultaneously and at a constant pH is so similar to the structure of hematite that it easily transforms into hematite particles.

引用

页码：2282 / 2286

页数：5

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