Solubility-controlled synthesis of high-quality Co3O4 nanocrystals

被引：254

作者：

He, T ^{[1
]}

Chen, DR ^{[1
]}

Jiao, XL ^{[1
]}

Wang, YL ^{[1
]}

Duan, YZ ^{[1
]}

机构：

[1] Shandong Univ, Dept Chem, Jinan 250100, Peoples R China

来源：

CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 15期

关键词：

D O I：

10.1021/cm050727s

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：

A liquid-phase redox process has been designed to prepare monodispersed Co3O4 nanocrystals with particle sizes of 2 nm (spherical), 2.5 nm (cubelike), and 4.7 nm (cubelike). The nanocrystals were characterized by transmission electron microscopy (TEM), high-resolution TEM, X-ray diffraction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and thermogravimetric techniques. The nucleation and growth, which were tracked by UV-visible spectroscopy, can be separated by adjusting the solubility of sodium nitrate, and the smallest possible Co3O4 nanocubes, 2.5 mn on a side, were obtained. A solubility-controlled mechanism for the redox reaction is discussed which is critical in avoiding secondary nucleation and interparticle ripening growth Of Co3O4 nanocrystals.

引用

页码：4023 / 4030

页数：8

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