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World Scientific Publishing, Functional Materials Letters, 04(08), p. 1550043

DOI: 10.1142/s1793604715500435

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Facile preparation of size-controlled TiO2 nanoparticles by hot-filament metal oxide deposition method and their gas sensing properties to NO2

Journal article published in 2015 by Xiaoguang San, Weiwei Xu, Guosheng Wang, Bing Liang, Nannan Hou, Fanli Meng ORCID
This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Abstract

Titanium dioxide ( TiO 2) nanoparticles were prepared by resistive heating Ti filament under an oxygen atmosphere. The obtained nanoparticles were confirmed to be a tetragonal crystal TiO 2 and the particle size increased with increasing the oxygen pressure. The NO 2 gas sensing properties of the TiO 2 nanoparticles were investigated. All the sensors made of TiO 2 nanoparticles with different particle sizes exhibited the maximum sensitivities to 1 ppm NO 2 at a relative low operating temperature of 150°C. Comparing with the large particle size of TiO 2 nanoparticles, the ones with the smallest particle size exhibited the highest sensitivity and the best response and recovery characteristic to various NO 2 gas concentrations.