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Journal of Nanomaterials
Volume 2014, Article ID 452659, 8 pages
Research Article

Synthesis of Novel YbxSb2 − xTe3 Hexagonal Nanoplates: Investigation of Their Physical, Structural, and Photocatalytic Properties

WCU Nano Research Center, School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea

Received 22 November 2013; Revised 28 April 2014; Accepted 29 April 2014; Published 29 May 2014

Academic Editor: Gong-Ru Lin

Copyright © 2014 Younes Hanifehpour and Sang Woo Joo. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Yb-doped Sb2Te3 nanomaterials were synthesized by a coreduction method in hydrothermal condition. Powder X-ray diffraction patterns indicate that the crystals ( ) are isostructural with Sb2Te3. The cell parameter decreases for compounds upon increasing the dopant content ( ), while increases. Scanning electron microscopy and transmission electron microscopy images show that doping of Yb3+ ions in the lattice of Sb2Te3 produces different morphology. The electrical conductivity of Yb-doped Sb2Te3 is higher than the pure Sb2Te3 and increases with temperature. By increasing concentration of the Yb3+ ions, the absorption spectrum of Sb2Te3 shows red shifts and some intensity changes. In addition to the characteristic red emission peaks of Sb2Te3, emission spectra of doped materials show other emission bands originating from f-f transitions of the Yb3+ ions. The photocatalytic performance of as-synthesized nanoparticles was investigated towards the decolorization of Malachite Green solution under visible light irradiation.