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Advances in Materials Science and Engineering
Volume 2013, Article ID 578460, 8 pages
http://dx.doi.org/10.1155/2013/578460
Research Article

Hydrothermal Synthesis of Pt-, Fe-, and Zn-doped Nanospheres and Carbon Monoxide Sensing Properties

1State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400030, China
2Chongqing Electric Power Research Institute, Chongqing 401123, China

Received 12 March 2013; Revised 23 July 2013; Accepted 24 July 2013

Academic Editor: Shivakiran Bhaktha

Copyright © 2013 Weigen Chen 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 M-doped (M = Pt, Fe, and Zn) SnO2 nanospheres were successfully synthesized via a simple and facile hydrothermal method and characterized by X-ray powder diffraction, field-emission scanning electron microscopy, and energy dispersive spectroscopy. Chemical gas sensors were fabricated based on the as-synthesized nanostructures, and carbon monoxide sensing properties were systematically measured. Compared to pure, Fe-, and Zn-doped SnO2 nanospheres, the Pt-doped SnO2 nanospheres sensor exhibits higher sensitivity, lower operating temperature, more rapid response and recovery, better stability, and excellent selectivity. In addition, a theoretical study based on the first principles calculation was conducted. All results demonstrate the potential of Pt dopant for improving the gas sensing properties of SnO2-based sensors to carbon monoxide.