Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 72, Issue 2, Pages 348-355Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2008.10.010
Keywords
Solvothermal; Carbon nanotubes; Eu(III) tungstates; Molybdates nanotubes; Luminescence
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Eu(III) tungstates and molybdates nanotubes have been successfully synthesized by the solvothermal method using carbon nanotubes (CNTs) as removable templates. The products were characterized by X-ray diffraction spectroscopy, transmission electron microscopy, energy-dispersive X-ray spectrometry, thermogravimetric and differential thermalanalysis. It is demonstrated that CNTs are fully coated with an amorphous Eu-2(MO4)(3) (M=W, Mo) layer, which is about 10 nm thick and almost continuous and uniform. After the Eu-2(MO4)(3) (M=W. Mo)/CNTs composites have been calcined at 700 degrees, Eu-2(MO4)(3) (M = W, Mo) nanotubes are obtained by removing the CNTs templates. The diameter of the Eu-2(MO4)(3) (M = W, Mo) nanotubes is 40-60 nm, which is consistent with that of CNTs. The luminescence properties of the Eu-2(MO4)(3) (M = W, Mo) nanotubes calcined at various temperatures have been investigated. The result shows that the Eu-2(MO4)(3) (M = W, Mo) nanotubes obtained from the Eu-2(MO4)(3) (M = W, Mo)/CNTs composites calcined at 700 degrees C display a strong red emission peak at around 611 nm. (c) 2008 Elsevier B.V. All rights reserved.
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