Use of ethylene oxide in the sol-gel synthesis of α-Fe2O3 nanoparticles from Fe(III) salts

被引：95

作者：

Dong, WT ^{[1
]}

Zhu, CS ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Photon Craft Project Lab, Shanghai 201800, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2002年 / 12卷 / 06期

关键词：

D O I：

10.1039/b200773h

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：

alpha-Fe2O3 nanoparticles were prepared by the sol-gel process with ethylene oxide (EO) and FeCl3 as starting materials. The influences of the molar ratio of EO to Cl-, the concentration of FeCl3, the volume percentage of ethanol and heat treatment on the structural properties of the alpha-Fe2O3 nanoparticles were investigated by XRD, TEM and SAXS (small angle X-ray scattering) techniques. It was found that the mean size of the alpha-Fe2O3 nanoparticles formed via the sol-gel process is smaller than those formed via the sol process. The values of the mass fractal dimension (D-m) for the alpha-Fe2O3 nanoparticles formed via the sol and sol-gel processes are 2 < D-m < 3 and 3 < D-m < 4, respectively.

引用

页码：1676 / 1683

页数：8

共 32 条

[1] SIZE-INDUCED STRUCTURAL PHASE-TRANSITIONS AND HYPERFINE PROPERTIES OF MICROCRYSTALLINE FE2O3 [J].