Nanostructured TiO2-based mixed metal oxides prepared using microemulsions for carbon monoxide detection

Theera Anukunprasert; Chintana Saiwan; Elisabetta Di Bartolomeo; Enrico Traversa

doi:10.1007/s10832-007-9165-8

Nanostructured TiO₂-based mixed metal oxides prepared using microemulsions for carbon monoxide detection

Theera Anukunprasert^*, Chintana Saiwan, Elisabetta Di Bartolomeo, Enrico Traversa

^*Corresponding author for this work

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

10 Scopus citations

Abstract

Nanostructured powders of Nb-doped TiO₂ (TN) and SnO₂ mixed with Nb-doped TiO₂ in two different atomic ratios-10 to 1 (TSN 101) and 1 to 1 (TSN 11)-were synthesized using the reverse micelle microemulsion of a nonionic surfactant (brine solution/1-hexanol/Triton X-100/cyclohexane). The powders were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Thick films were fabricated for gas sensors and characterized by XRD analysis and field emission scanning electron microscopy (FE-SEM). The effects of the film morphology and firing temperature in the range 650-850 °C on CO sensitivity were studied. The best gas response, expressed as the ratio between the resistance in air and the resistance under gas exposure (R _air/R _gas), was measured for TSN 11 at 11 for 1,000 ppm CO exposure. All types of sensors showed good thermal stability. The electrochemical impedance spectroscopy (EIS) measurements were performed in different gas atmospheres (air, O₂, CO and NO ₂) to better understand the electrical properties of the nanostructured mixed metal oxides.

Original language	English (US)
Pages (from-to)	295-303
Number of pages	9
Journal	Journal of Electroceramics
Volume	18
Issue number	3-4
DOIs	https://doi.org/10.1007/s10832-007-9165-8
State	Published - Aug 2007
Externally published	Yes

Keywords

Carbon monoxide
Gas sensor
Microemulsions
Nanostructured mixed metal oxides

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Mechanics of Materials
Materials Chemistry
Electrical and Electronic Engineering

Access to Document

10.1007/s10832-007-9165-8

Cite this

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title = "Nanostructured TiO2-based mixed metal oxides prepared using microemulsions for carbon monoxide detection",

abstract = "Nanostructured powders of Nb-doped TiO2 (TN) and SnO2 mixed with Nb-doped TiO2 in two different atomic ratios-10 to 1 (TSN 101) and 1 to 1 (TSN 11)-were synthesized using the reverse micelle microemulsion of a nonionic surfactant (brine solution/1-hexanol/Triton X-100/cyclohexane). The powders were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Thick films were fabricated for gas sensors and characterized by XRD analysis and field emission scanning electron microscopy (FE-SEM). The effects of the film morphology and firing temperature in the range 650-850 °C on CO sensitivity were studied. The best gas response, expressed as the ratio between the resistance in air and the resistance under gas exposure (R air/R gas), was measured for TSN 11 at 11 for 1,000 ppm CO exposure. All types of sensors showed good thermal stability. The electrochemical impedance spectroscopy (EIS) measurements were performed in different gas atmospheres (air, O2, CO and NO 2) to better understand the electrical properties of the nanostructured mixed metal oxides.",

keywords = "Carbon monoxide, Gas sensor, Microemulsions, Nanostructured mixed metal oxides",

author = "Theera Anukunprasert and Chintana Saiwan and {Di Bartolomeo}, Elisabetta and Enrico Traversa",

year = "2007",

month = aug,

doi = "10.1007/s10832-007-9165-8",

language = "English (US)",

volume = "18",

pages = "295--303",

journal = "Journal of Electroceramics",

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T1 - Nanostructured TiO2-based mixed metal oxides prepared using microemulsions for carbon monoxide detection

AU - Anukunprasert, Theera

AU - Saiwan, Chintana

AU - Di Bartolomeo, Elisabetta

AU - Traversa, Enrico

PY - 2007/8

Y1 - 2007/8

N2 - Nanostructured powders of Nb-doped TiO2 (TN) and SnO2 mixed with Nb-doped TiO2 in two different atomic ratios-10 to 1 (TSN 101) and 1 to 1 (TSN 11)-were synthesized using the reverse micelle microemulsion of a nonionic surfactant (brine solution/1-hexanol/Triton X-100/cyclohexane). The powders were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Thick films were fabricated for gas sensors and characterized by XRD analysis and field emission scanning electron microscopy (FE-SEM). The effects of the film morphology and firing temperature in the range 650-850 °C on CO sensitivity were studied. The best gas response, expressed as the ratio between the resistance in air and the resistance under gas exposure (R air/R gas), was measured for TSN 11 at 11 for 1,000 ppm CO exposure. All types of sensors showed good thermal stability. The electrochemical impedance spectroscopy (EIS) measurements were performed in different gas atmospheres (air, O2, CO and NO 2) to better understand the electrical properties of the nanostructured mixed metal oxides.

AB - Nanostructured powders of Nb-doped TiO2 (TN) and SnO2 mixed with Nb-doped TiO2 in two different atomic ratios-10 to 1 (TSN 101) and 1 to 1 (TSN 11)-were synthesized using the reverse micelle microemulsion of a nonionic surfactant (brine solution/1-hexanol/Triton X-100/cyclohexane). The powders were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Thick films were fabricated for gas sensors and characterized by XRD analysis and field emission scanning electron microscopy (FE-SEM). The effects of the film morphology and firing temperature in the range 650-850 °C on CO sensitivity were studied. The best gas response, expressed as the ratio between the resistance in air and the resistance under gas exposure (R air/R gas), was measured for TSN 11 at 11 for 1,000 ppm CO exposure. All types of sensors showed good thermal stability. The electrochemical impedance spectroscopy (EIS) measurements were performed in different gas atmospheres (air, O2, CO and NO 2) to better understand the electrical properties of the nanostructured mixed metal oxides.

KW - Carbon monoxide

KW - Gas sensor

KW - Microemulsions

KW - Nanostructured mixed metal oxides

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