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Journal of Advanced Ceramics 2015, 4(2): 152-157 https://doi.org/10.1007/s40145-015-0148-y
Research Article | Open Access | Issue | Published: 30 May 2015

Gas sensing capabilities of TiO2 porous nanoceramics prepared through premature sintering

Show Author's Information Yao XIONGa,  Zilong TANGb,  Yu WANGc,  Yongming HUd,  Haoshuang GUd,  Yuanzhi LIe,  Helen Lai Wah CHANc,  Wanping CHENa( )
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, China
Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China
Keywords:
TiO2, porous nanoceramics, premature sintering, sensors, hydrogen, CO
Cite this article:
XIONG Y, TANG Z, WANG Y, et al. Gas sensing capabilities of TiO2 porous nanoceramics prepared through premature sintering. Journal of Advanced Ceramics, 2015, 4(2): 152-157. https://doi.org/10.1007/s40145-015-0148-y
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Abstract Full text About this article

Pure and noble metal (Pt, Pd, and Au) doped TiO2 nanoceramics have been prepared from TiO2 nanoparticles through traditional pressing and sintering. For those samples sintered at 550 ℃, a typical premature sintering occurred, which led to the formation of a highly porous microstructure with a Brunauer–Emmett–Teller (BET) specific surface area of 23 m2/g. At room temperature, only Pt-doped samples showed obvious response to hydrogen, with sensitivities as high as ~500 for 1000 ppm H2 in N2; at 300 ℃, all samples showed obvious responses to CO, while the responses of noble metal doped samples were much higher than that of the undoped ones. The mechanism for the observed sensing capabilities has been discussed, in which the catalytic effect of Pt for hydrogen is believed responsible for the room-temperature hydrogen sensing capabilities, and the absence of glass frit as commonly used in commercial thick-film metal oxide gas sensors is related to the high sensitivities. It is proposed that much attention should be paid to metal oxide porous nanoceramics in developing gas sensors with high sensitivities and low working temperatures.


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About this article

Gas sensing capabilities of TiO2 porous nanoceramics prepared through premature sintering

Show Author's information Yao XIONGa, Zilong TANGb, Yu WANGc, Yongming HUd, Haoshuang GUd, Yuanzhi LIe, Helen Lai Wah CHANc, Wanping CHENa( )
Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China
School of Materials Science and Engineering, State Key Laboratory of New Ceramics and Fine Processing, Tsinghua University, Beijing 100084, China
Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Hong Kong, China
Faculty of Physics and Electronic Technology, Hubei University, Wuhan 430062, China
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

Abstract

Pure and noble metal (Pt, Pd, and Au) doped TiO2 nanoceramics have been prepared from TiO2 nanoparticles through traditional pressing and sintering. For those samples sintered at 550 ℃, a typical premature sintering occurred, which led to the formation of a highly porous microstructure with a Brunauer–Emmett–Teller (BET) specific surface area of 23 m2/g. At room temperature, only Pt-doped samples showed obvious response to hydrogen, with sensitivities as high as ~500 for 1000 ppm H2 in N2; at 300 ℃, all samples showed obvious responses to CO, while the responses of noble metal doped samples were much higher than that of the undoped ones. The mechanism for the observed sensing capabilities has been discussed, in which the catalytic effect of Pt for hydrogen is believed responsible for the room-temperature hydrogen sensing capabilities, and the absence of glass frit as commonly used in commercial thick-film metal oxide gas sensors is related to the high sensitivities. It is proposed that much attention should be paid to metal oxide porous nanoceramics in developing gas sensors with high sensitivities and low working temperatures.

Keywords: TiO2, porous nanoceramics, premature sintering, sensors, hydrogen, CO

References(19)

[1]
Korotcenkov G. Handbook of Gas Sensor Materials: Properties, Advantages and Shortcomings for Applications. New York:Springer, 2013.
[2]
Boon-Brett L, Bousek J, Black G, et al. Identifying performance gaps in hydrogen safety sensor technology for automotive and stationary applications. Int J Hydrogen Energ 2010, 35:373-384.
DOI Google Scholar
[3]
Varghese OK, Gong D, Paulose M, et al. Extreme changes in the electrical resistance of titania nanotubes with hydrogen exposure. Adv Mater 2003, 15:624-627.
DOI Google Scholar
[4]
Kim W-S, Lee B-S, Kim D-H, et al. SnO2 nanotubes fabricated using electrospinning and atomic layer deposition and their gas sensing performance. Nanotechnology 2010, 21:245605.
DOI Google Scholar
[5]
Köck A, Tischner A, Maier T, et al. Atmospheric pressure fabrication of SnO2-nanowires for highly sensitive CO and CH4 detection. Sensor Actuat B: Chem 2009, 138:160-167.
DOI Google Scholar
[6]
Zou X, Wang J, Liu X, et al. Rational design of sub-parts per million specific gas sensors array based on metal nanoparticles decorated nanowire enhancement-mode transistors. Nano Lett 2013, 13:3287-3292.
DOI Google Scholar
[7]
Qian LH, Wang K, Li Y, et al. CO sensor based on Au-decorated SnO2 nanobelt. Mater Chem Phys 2006, 100:82-84.
DOI Google Scholar
[8]
Varghese OK, Gong D, Paulose M, et al. Crystallization and high-temperature structural stability of titanium oxide nanotube arrays. J Mater Res 2003, 18:156-165.
DOI Google Scholar
[9]
Pavelko RG, Vasiliev AA, Llobet E, et al. Comparative study of nanocrystalline SnO2 materials for gas sensor application: Thermal stability and catalytic activity. Sensor Actuat B: Chem 2009, 137:637-643.
DOI Google Scholar
[10]
Bahu M, Kumar K, Bahu T. CuO–ZnO semiconductor gas sensor for ammonia at room temperature. J Electron Devices 2012, 14:1137-1141.
Google Scholar
[11]
Xu H, Liu X, Li M, et al. Preparation and characterization of TiO2 bulk porous nanosolids. Mater Lett 2005, 59:1962-1966.
DOI Google Scholar
[12]
Yu Q, Wang K, Luan C, et al. A dual-functional highly responsive gas sensor fabricated from SnO2 porous nanosolid. Sensor Actuat B: Chem 2011, 159:271-276.
DOI Google Scholar
[13]
Wang K, Zhao T, Lian G, et al. Room temperature CO sensor fabricated from Pt-loaded SnO2 porous nanosolid. Sensor Actuat B: Chem 2013, 184:33-39.
DOI Google Scholar
[14]
Yan Z, Zhu K, Chen W-P. ZnO quasibicrystals formed by thermal annealing. Appl Phys Lett 2008, 92:241912.
DOI Google Scholar
[15]
Gurlo A. Interplay between O2 and SnO2: Oxygen ionosorption and spectroscopic evidence for adsorbed oxygen. Chem Phys Chem 2006, 7:2041-2052.
DOI Google Scholar
[16]
Liao L, Lu HB, Li JC, et al. Size dependence of gas sensitivity of ZnO nanorods. J Phys Chem C 2007, 111:1900-1903.
DOI Google Scholar
[17]
Herrmann J-M, Pichat P. Metal-support interactions: An in situ electrical conductivity study of Pt/TiO2 catalysts. J Catal 1982, 78:425-435.
DOI Google Scholar
[18]
Chen W, Li L, Wang Y, et al. Effects of electrochemical hydrogen charging on lead-based relaxor ferroelectric multilayer ceramic capacitors. J Mater Res 1998, 13:1110-1112.
DOI Google Scholar
[19]
Lee JM, Park J, Kim S, et al. Ultra-sensitive hydrogen gas sensors based on Pd-decorated tin dioxide nanostructures: Room temperature operating sensors. Int J Hydrogen Energ 2010, 35:12568-12573.
DOI Google Scholar
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Publication history

Received: 08 May 2015
Accepted: 10 May 2015
Published: 30 May 2015
Issue date: June 2015

Copyright

© The author(s) 2015

Acknowledgements

This work was supported by the National High-tech R&D Program of China (863 Program) (No. 2013AA031903) and the National Natural Science Foundation of China under Grant Nos. J1210061 and 50772077.

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Open Access: This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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