Fabrication and characterization of the plate-shaped γ-Fe2O3 nanocrystals

被引：170

作者：

Ni, YH ^{[1
]}

Ge, XW ^{[1
]}

Zhang, ZC ^{[1
]}

Ye, Q ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Appl Chem, Hefei 230026, Anhui, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2002年 / 14卷 / 03期

关键词：

D O I：

10.1021/cm010446u

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：

Plate-shaped gamma-Fe2O3 nanocrystals have been successfully prepared in a water system by a simple reduction-oxidation method at room temperature and under ambient pressure. The reactions contain two steps: first, Fe(II) is reduced into Fe atoms by gamma-ray irradiation in nitrogen atmosphere; then, Fe atoms are oxidized into gamma-Fe2O3 in air. XRD, TEM, EDXA, XPS, and Mossbauer spectrum were used to characterize the final product. The magnetic characterization showed that the gamma-Fe2O3 nanocrystals have a specific saturation magnetization of 83 emu/g and a coercivity of 320 Oe (25.5 kA/m). A possible formation mechanism of the plate-shaped Y-Fe2O3 nanocrystals was suggested.

引用

页码：1048 / 1052

页数：5

共 23 条

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