One-step synthesis of superparamagnetic monodisperse porous Fe3O4 hollow and core-shell spheres

被引：317

作者：

Cheng, Wei ^{[1
]}

Tang, Kaibin ^{[1
]}

Qi, Yunxia ^{[1
]}

Sheng, Jie ^{[1
]}

Liu, Zhongpin ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Chem, Div Nanomat & Chem, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2010年 / 20卷 / 09期

基金：

中国国家自然科学基金;

关键词：

IRON-OXIDE NANOPARTICLES; TEMPLATE-FREE SYNTHESIS; LARGE-SCALE SYNTHESIS; FABRICATION; GROWTH; AGGREGATION; UNIFORM; TIO2; SNO2; MICROSTRUCTURE;

D O I：

10.1039/b919164j

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：

Monodisperse hollow and core-shell magnetite (Fe3O4) spheres have been prepared by a simple one-pot method based on hydrothermal treatment of FeCl3, citrate, polyacrylamide and urea. The as-prepared samples have been characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption isotherms, superconducting quantum interference device magnetometer. The results of control experiments reveal that citrate and polyacrylamide are crucial for the formation of spherical product and the well known Ostwald ripening process is responsible for the transformation from solid spheres to hollow and core-shell spheres. The hollow and core-shell magnetite spheres are porous and highly water soluble. They exhibit superparamagnetic properties with relatively high saturation magnetization at room temperature. The superparamagnetic properties, high magnetization, high water solubility, together with the hollow interiors will render them ideal candidates for various biomedical applications.

引用

页码：1799 / 1805

页数：7

共 72 条

[1] Formation of a three-dimensional microstructure of Fe3O4-poly(vinyl alcohol) composite by evaporating the hydrosol under a magnetic field [J].