Novel tunable hierarchical Ni-Co hydroxide and oxide assembled from two-wheeled units

被引：48

作者：

Gao, Hongyi ^{[1
]}

Wang, Ge ^{[1
]}

Yang, Mu ^{[1
]}

Tan, Li ^{[1
]}

Yu, Jie ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

NANOTECHNOLOGY | 2012年 / 23卷 / 01期

基金：

美国国家科学基金会;

关键词：

ONE-POT SYNTHESIS; NICKEL-HYDROXIDE; THERMAL-DECOMPOSITION; TRANSITION-METAL; NANOPARTICLES; HETERODIMERS; BETA-NI(OH)(2); NANOCRYSTALS; NI(OH)(2); NANOSTRUCTURES;

D O I：

10.1088/0957-4484/23/1/015607

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A novel hierarchical Ni-Co hydroxide assembled from two-wheeled units was successfully synthesized via a simple, hydrothermal method through the reaction of nickel salt, cobalt salt and sodium hydroxide, and with a chelating agent (EDA) to control the precipitation rate. The as-synthesized materials were characterized by x-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), atomic absorption spectrophotometer (AAS) and thermogravimetric analysis (TG). The Ni2+/Co2+ molar ratio R in the initial solution plays an important role to control the morphology of the hierarchical Ni-Co hydroxide. The influence of the EDA concentration, reaction temperature and NaOH concentration on the formation of the hierarchical Ni-Co hydroxide was also investigated. The formation mechanism of the hierarchical Ni-Co hydroxide assembled by two-wheeled units was proposed. A Ni-Co oxide with a similar structure was obtained by calcination of the as-prepared Ni-Co hydroxide.

引用

页数：8

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