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Preparation, characterization, and luminescent properties of NaGd(WO4)2:Eu3+ nanotubes using carbon nanotubes as templates

Published online by Cambridge University Press:  11 April 2012

Ying Huang ,
Liqun Zhou ,
Hejuan Song ,
Ting Wang ,
Lan Yang  and
Ling Li
Ying Huang*
Affiliation:
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People’s Republic of China
Liqun Zhou*
Affiliation:
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People’s Republic of China
Hejuan Song
Affiliation:
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People’s Republic of China
Ting Wang
Affiliation:
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People’s Republic of China
Lan Yang
Affiliation:
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People’s Republic of China
Ling Li
Affiliation:
Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules and College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, People’s Republic of China
*
a)Address all correspondence to these authors. e-mail: huangying1114@163.com
b)e-mail: zlq@hubu.edu.cn
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Abstract

NaGd(WO4)2:Eu3+ nanotubes have been successfully synthesized by the hydrothermal method using carbon nanotubes (CNTs) as removable templates. X-ray diffraction, thermogravimetric and differential thermal analysis, transmission electron microscopy, and photoluminescence were used to characterize the product. It is demonstrated that CNTs are fully coated with an amorphous NaGd(WO4)2:Eu3+ layer, which is about 7 nm thick and almost continuous and uniform. After the NaGd(WO4)2:Eu3+/CNTs composites have been calcined at 500 or 600 °C, NaGd(WO4)2:Eu3+ nanotubes are obtained by removing the CNTs templates, and the outer diameter of that is about 40 nm. The luminescence properties of the NaGd(WO4)2:Eu3+ nanotubes calcined at various temperatures have been investigated. The results indicate that the products exhibit a characteristic red emission peak of Eu3+ ions at 615 nm. The emission intensity decreases with the increasing of annealing temperature, which is probably because a few residual carbons doped in NaGd(WO4)2:Eu3+ nanotubes and many oxygen vacancies could promote the intensity of red emission of Eu3+.

Keywords

LuminescenceHydrothermalNanostructure
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 9 , 14 May 2012 , pp. 1265 - 1270
Copyright
Copyright © Materials Research Society 2012

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