The development of gas sensor for carbon monoxide monitoring using nanostructure of Nb-TiO2

T. Anukunprasert; C. Saiwan; E. Traversa

doi:10.1016/j.stam.2005.02.020

The development of gas sensor for carbon monoxide monitoring using nanostructure of Nb-TiO₂

T. Anukunprasert^*, C. Saiwan, E. Traversa

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

93 Scopus citations

Abstract

The development of titanium dioxide (TiO₂) as a gas sensor for combustion and exhaust air pollutants monitoring is strongly dependent on its properties such as thermal stability, grain size and surface area. In this study, nanostructure TiO₂ with its thermal stability enhanced by niobium dopant (Nb-TiO₂) was synthesized using the water-in-oil (w/o) microemulsion system of n-heptane/water/sodium bis (2-ethylhexyl) sulfosuccinate (AOT) surfactant and was compared with undoped TiO₂. It was found that the synthesized powder was of uniform size (14 nm) and high surface area (80 m²/g). Nb-doped TiO₂ at a level of 3-5 mole% clearly hinders the anatase to rutile phase transformation and inhibits the grain growth in comparison with pure TiO₂. The nanostructure of anatase was maintained even after the powder was fired at 850 °C. The result indicates that sensitivity of CO is significantly increased with an increase of thermal stability of Nb-doped TiO₂ in comparison with those of undoped TiO₂ and thus is useful for CO sensing studies at high temperatures.

Original language	English (US)
Pages (from-to)	359-363
Number of pages	5
Journal	Science and Technology of Advanced Materials
Volume	6
Issue number	3-4 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.stam.2005.02.020
State	Published - Apr 2005
Externally published	Yes

Bibliographical note

Funding Information:
I would like to thanks the following peoples and organization; The Thailand Research Fund (TRF) for financial support, The National Metal and Materials Technology Center (M-TEC) and Dr Angkhana Jaroenworaluck for TEM photographs, Professor Harold Wittcoff, Elisabetta, Maria Luisa and all the people in sensor laboratory at The University of Rome ‘Tor Vergata’ for all helps and support.

Keywords

Carbon monoxide gas sensor
Microemulsion and nanostructure
Titanium dioxide

ASJC Scopus subject areas

General Materials Science

Access to Document

10.1016/j.stam.2005.02.020

Cite this

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title = "The development of gas sensor for carbon monoxide monitoring using nanostructure of Nb-TiO2",

abstract = "The development of titanium dioxide (TiO2) as a gas sensor for combustion and exhaust air pollutants monitoring is strongly dependent on its properties such as thermal stability, grain size and surface area. In this study, nanostructure TiO2 with its thermal stability enhanced by niobium dopant (Nb-TiO2) was synthesized using the water-in-oil (w/o) microemulsion system of n-heptane/water/sodium bis (2-ethylhexyl) sulfosuccinate (AOT) surfactant and was compared with undoped TiO2. It was found that the synthesized powder was of uniform size (14 nm) and high surface area (80 m2/g). Nb-doped TiO2 at a level of 3-5 mole% clearly hinders the anatase to rutile phase transformation and inhibits the grain growth in comparison with pure TiO2. The nanostructure of anatase was maintained even after the powder was fired at 850 °C. The result indicates that sensitivity of CO is significantly increased with an increase of thermal stability of Nb-doped TiO2 in comparison with those of undoped TiO2 and thus is useful for CO sensing studies at high temperatures.",

keywords = "Carbon monoxide gas sensor, Microemulsion and nanostructure, Titanium dioxide",

author = "T. Anukunprasert and C. Saiwan and E. Traversa",

note = "Funding Information: I would like to thanks the following peoples and organization; The Thailand Research Fund (TRF) for financial support, The National Metal and Materials Technology Center (M-TEC) and Dr Angkhana Jaroenworaluck for TEM photographs, Professor Harold Wittcoff, Elisabetta, Maria Luisa and all the people in sensor laboratory at The University of Rome {\textquoteleft}Tor Vergata{\textquoteright} for all helps and support.",

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AU - Anukunprasert, T.

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AU - Traversa, E.

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N2 - The development of titanium dioxide (TiO2) as a gas sensor for combustion and exhaust air pollutants monitoring is strongly dependent on its properties such as thermal stability, grain size and surface area. In this study, nanostructure TiO2 with its thermal stability enhanced by niobium dopant (Nb-TiO2) was synthesized using the water-in-oil (w/o) microemulsion system of n-heptane/water/sodium bis (2-ethylhexyl) sulfosuccinate (AOT) surfactant and was compared with undoped TiO2. It was found that the synthesized powder was of uniform size (14 nm) and high surface area (80 m2/g). Nb-doped TiO2 at a level of 3-5 mole% clearly hinders the anatase to rutile phase transformation and inhibits the grain growth in comparison with pure TiO2. The nanostructure of anatase was maintained even after the powder was fired at 850 °C. The result indicates that sensitivity of CO is significantly increased with an increase of thermal stability of Nb-doped TiO2 in comparison with those of undoped TiO2 and thus is useful for CO sensing studies at high temperatures.

AB - The development of titanium dioxide (TiO2) as a gas sensor for combustion and exhaust air pollutants monitoring is strongly dependent on its properties such as thermal stability, grain size and surface area. In this study, nanostructure TiO2 with its thermal stability enhanced by niobium dopant (Nb-TiO2) was synthesized using the water-in-oil (w/o) microemulsion system of n-heptane/water/sodium bis (2-ethylhexyl) sulfosuccinate (AOT) surfactant and was compared with undoped TiO2. It was found that the synthesized powder was of uniform size (14 nm) and high surface area (80 m2/g). Nb-doped TiO2 at a level of 3-5 mole% clearly hinders the anatase to rutile phase transformation and inhibits the grain growth in comparison with pure TiO2. The nanostructure of anatase was maintained even after the powder was fired at 850 °C. The result indicates that sensitivity of CO is significantly increased with an increase of thermal stability of Nb-doped TiO2 in comparison with those of undoped TiO2 and thus is useful for CO sensing studies at high temperatures.

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