Structural evolution and characteristics of the phase transformations between α-Fe2O3, Fe3O4 and γ-Fe2O3 nanoparticles under reducing and oxidizing atmospheres

被引：307

作者：

Zhang, Xin ^{[1
]}

Niu, Yongan ^{[2
]}

Meng, Xiangdong ^{[3
]}

Li, Yao ^{[2
]}

Zhao, Jiupeng ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Chem Engn & Technol, Harbin 150040, Peoples R China

[2] Harbin Inst Technol, Ctr Composite Mat, Harbin 150040, Peoples R China

[3] Jilin Normal Univ, Sch Phys, Siping 136000, Peoples R China

来源：

CRYSTENGCOMM | 2013年 / 15卷 / 40期

关键词：

MONODISPERSE FE3O4; FE2O3; NANOPARTICLES; MAGNETIC-PROPERTIES; HEMATITE; OXIDE; NANOWIRES; NANOTUBES; MAGHEMITE;

D O I：

10.1039/c3ce41269e

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

The mechanism and conditions for the phase transformations from alpha-Fe2O3 to Fe3O4 and Fe3O4 to gamma-Fe2O3 nanoparticles have been investigated by the thermal analysis method. The morphologies and structures of various nanoparticles after annealing in H-2 : Ar at 294 degrees C and in an O-2 atmosphere at 302 degrees C have been examined and characterized. Finally, we confirmed that the monodisperse, porous and magnetic gamma-Fe2O3 nanoparticles could be obtained by annealing the alpha-Fe2O3 nanoparticles synthesized by the hydrothermal route.

引用

页码：8166 / 8172

页数：7

共 41 条

[1]

[Anonymous], SOV PHYS JETP

[2]

Controlled growth of single-crystalline, nanostructured dendrites and snowflakes of α-Fe2O3: influence of the surfactant on the morphology and investigation of morphology dependent magnetic properties [J].