Influence of grain size, oxygen stoichiometry, and synthesis conditions on the γ-Fe2O3 vacancies ordering and lattice parameters

被引：124

作者：

Belin, T ^{[1
]}

Guigue-Millot, N ^{[1
]}

Caillot, T ^{[1
]}

Aymes, D ^{[1
]}

Niepce, JC ^{[1
]}

机构：

[1] Univ Bourgogne, CNRS, UMR 5613, Lab Rech React Solides, F-21078 Dijon, France

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2002年 / 163卷 / 02期

关键词：

maghemite; soft chemistry; nanometric crystallites; X-ray diffraction; surface;

D O I：

10.1006/jssc.2001.9426

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The soft chemistry method has been used to synthesize gamma-Fe2O3 nanoparticles: various synthesis temperature were applied to obtain nanometric powders with crystallite size in the 9-14 nm range. Powders were characterized by X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectrophotometry, surface area measurements, and electron microscopy (TEM, SEM). It is clearly shown that these nanometric powders are very well cry stallized as indicated by XRD and IR spectra which present substructural bands attributed to vacancies ordering (P4(1)32). Based on these model materials and in the crystallite size range studied here, cell parameter appears to be not linked to, crystallite size. It rather depends both on hydroxide adsorption and chemical composition. (C) 2002 Elsevier Science.

引用

页码：459 / 465

页数：7

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