Photocatalytical Decomposition of Contaminants οn Thin Film Gas Sensors

• Authors: M. Radecka , B. Łysoń , M. Lubecka , A. Czapla , K. Zakrzewska
• Languages of publication: EN

Abstracts

EN

Gas sensing materials have been prepared in a form of TiO_{2}-SnO_{2} thin films by rf reactive sputtering from Ti:SnO_{2} and Sn:TiO_{2} targets. Material studies have been performed by scanning electron microscopy, atomic force microscopy, X-ray diffraction at grazing incidence, Mössbauer spectroscopy, X-ray photoelectron spectroscopy and optical spectrophotometry. Dynamic gas sensing responses have been recorded as reproducible changes in the electrical resistance upon introduction of hydrogen at a partial pressure of 100-6000 ppm over a wide temperature range 473-873 K. Contamination experiments have been carried out with the motor oil (40 vol.% solution in CCl_{4}) in order to study the effect of UV light illumination on the gas sensor response. Optical spectroscopy has been applied to monitor the photodecomposition of the test compound, bromothymol blue. The Electronic Nose, ALPHA MOS FOX 4000 has been used in order to differentiate between different groups of motor oil vapors.

Keywords

EN

73.61.-r; 73.90.+f; 82.50.Hp

Discipline

• 82.50.Hp: Processes caused by visible and UV light
• 73.61.-r: Electrical properties of specific thin films(for optical properties of thin films, see 78.20.-e and 78.66.-w; for magnetic properties of thin films, see 75.70.-i)
• 73.90.+f: Other topics in electronic structure and electrical properties of surfaces, interfaces, thin films, and low-dimensional structures (Restricted to new topics in section 73)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 117
• Issue: 2
• Pages: 415-419

Dates

published

2010-02

Contributors

author

M. Radecka

• Department of Inorganic Chemistry, Faculty of Material Science and Ceramics, AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

author

B. Łysoń

• Department of Electronics, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

author

M. Lubecka

• Department of Electronics, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

author

A. Czapla

• Department of Electronics, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

author

K. Zakrzewska

• Department of Electronics, Faculty of Electrical Engineering, Automatics, Computer Science and Electronics AGH-University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.117.415