Preparation and characterization of Co-doped ZnO nanomaterials

被引：77

作者：

Yang, Huaming ^{[1
]}

Nie, Sha ^{[1
]}

机构：

[1] Cent S Univ, Sch Resources Proc & Bioengn, Dept Inorgan Mat, Changsha 410083, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2009年 / 114卷 / 01期

关键词：

Zinc oxide; Cobalt; Doping; Freeze-drying; Optical properties;

D O I：

10.1016/j.matchemphys.2008.09.017

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Freeze-drying is a convenient cryochemical powder processing method. In this paper, Co-doped ZnO nanomaterials (CZN) with Co content from 2 mol% to 10 mol% have been successfully synthesized via a novel freeze-drying route. X-ray diffraction (XRD), transmission electronic microscopy (TEM) and high-resolution TEM (HRTEM) were used to characterize the structure and morphology of the as-synthesized samples. All samples have a similar hexagonal wurtzite phase without metal cobalt, cobalt oxides or composites in the samples with Co concentration below 6 mol%. TEM image shows that CZN (4 mol% Co) is nanometer scale with average crystal size of 40 nm. Samples have a spherical morphology with moderate aggregation. The band gap energy of CZN from ultraviolet-visible (UV-vis) spectroscopy decreases with increasing the Co doping concentration. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：279 / 282

页数：4

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