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

共 18 条

[1] Fabrication of ZnO-based metal-insulator-semiconductor diodes by ion implantation [J].

Alivov, YI ;

Look, DC ;

Ataev, BM ;

Chukichev, MV ;

Mamedov, VV ;

Zinenko, VI ;

Agafonov, YA ;

Pustovit, AN .

SOLID-STATE ELECTRONICS, 2004, 48 (12) :2343-2346

[2] Tuning the bandgap of ZnO by substitution with Mn2+, Co2+ and Ni2+ [J].

Bhat, SV ;

Deepak, FL .

SOLID STATE COMMUNICATIONS, 2005, 135 (06) :345-347

[3] Synthesis and magnetic properties of Co-doped ZnO nanowires [J].

Cui, Jingbiao ;

Zeng, Qi ;

Gibson, Ursula J. .

JOURNAL OF APPLIED PHYSICS, 2006, 99 (08)

[4] Synthesis and photoluminescence of ZnO nanowires/nanorods [J].

Grabowska, J ;

Nanda, KK ;

McGlynn, E ;

Mosnier, JP ;

Henry, MO ;

Beaucamp, A ;

Meaney, A .

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, 2005, 16 (07) :397-401

[5] Temperature-dependent photoluminescence of quasialigned Al-doped ZnO nanorods [J].

He, H. P. ;

Tang, H. P. ;

Ye, Z. Z. ;

Zhu, L. P. ;

Zhao, B. H. ;

Wang, L. ;

Li, X. H. .

APPLIED PHYSICS LETTERS, 2007, 90 (02)

[6] Properties of p-type and n-type ZnO influenced by P concentration [J].

Hu, Guangxia ;

Gong, Hao ;

Chor, E. F. ;

Wu, Ping .

APPLIED PHYSICS LETTERS, 2006, 89 (25)

[7] Influence of defects on the magnetism of Mn-doped ZnO [J].

Iusan, D. ;

Sanyal, B. ;

Eriksson, O. .

JOURNAL OF APPLIED PHYSICS, 2007, 101 (09)

[8]

IVETIC T, 2007, CERAM INT, P1

[9] Transition metal-doped TiO2 and ZnO -: present status of the field [J].

Janisch, R ;

Gopal, P ;

Spaldin, NA .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (27) :R657-R689

[10] Observation of optical properties related to room-temperature ferromagnetism in co-sputtered Zn1-xCoxO thin films [J].

Lim, SW ;

Hwang, DK ;

Myoung, JM .

SOLID STATE COMMUNICATIONS, 2003, 125 (05) :231-235

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