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Journal of Nanomaterials
Volume 2013 (2013), Article ID 751826, 6 pages
http://dx.doi.org/10.1155/2013/751826
Research Article

Y-Doped ZnO Nanorods by Hydrothermal Method and Their Acetone Gas Sensitivity

1School of Electronic Science and Technology, Dalian University of Technology, Dalian, Liaoning 116023, China
2Department of Electromechanical Engineering and Information, Dalian Nationalities University, Dalian, Liaoning 116600, China
3School of Educational Technology, Shenyang Normal University, Shenyang, Liaoning 110000, China

Received 21 October 2013; Accepted 9 December 2013

Academic Editor: Xiangyu Zhao

Copyright © 2013 Peng Yu et al. 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.

Abstract

Pure and yttrium- (Y-) doped (1 at%, 3 at%, and 7 at%) ZnO nanorods were synthesized using a hydrothermal process. The crystallography and microstructure of the synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). Comparing with pure ZnO nanorods, Y-doped ZnO exhibited improved acetone sensing properties. The response of 1 at% Y-doped ZnO nanorods to 100 ppm acetone is larger than that of pure ZnO nanorods. The response and recovery times of 1 at% Y-doped ZnO nanorods to 100 ppm acetone are about 30 s and 90 s, respectively. The gas sensor based on Y-doped ZnO nanorods showed good selectivity to acetone in the interfere gases of ammonia, benzene, formaldehyde, toluene, and methanol. The formation mechanism of the ZnO nanorods was briefly analyzed.