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

被引：1
作者：
San, Xiaoguang [1 ]
Xu, Weiwei [2 ]
Wang, Guosheng [1 ]
Liang, Bing [3 ]
Hou, Nannan [4 ]
Meng, Fanli [4 ]
机构：
[1] Shenyang Univ Chem Technol, Coll Chem Engn, Shenyang 110142, Peoples R China
[2] Shenyang Res Inst Photog & Mat & Chem Ind, Shenyang 110141, Peoples R China
[3] Shenyang Univ Chem Technol, Coll Mat Sci & Engn, Shenyang 110142, Peoples R China
[4] Chinese Acad Sci, Inst Intelligent Machines, Res Ctr Biomimet Funct Mat & Sensing Devices, Hefei 230031, Peoples R China
来源：
FUNCTIONAL MATERIALS LETTERS | 2015年 / 8卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Hot-filament metal oxide deposition; TiO2; nanoparticles; sensors; NO2; GRAIN-SIZE; SENSORS;
D O I：
10.1142/S1793604715500435
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Titanium dioxide (TiO2) nanoparticles were prepared by resistive heating Ti filament under an oxygen atmosphere. The obtained nanoparticles were confirmed to be a tetragonal crystal TiO2 and the particle size increased with increasing the oxygen pressure. The NO2 gas sensing properties of the TiO2 nanoparticles were investigated. All the sensors made of TiO2 nanoparticles with different particle sizes exhibited the maximum sensitivities to 1 ppm NO2 at a relative low operating temperature of 150 degrees C. Comparing with the large particle size of TiO2 nanoparticles, the ones with the smallest particle size exhibited the highest sensitivity and the best response and recovery characteristic to various NO2 gas concentrations.
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页数：4
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