TiO2 Nano-Powders as Potential Low-Temperature Optical Gas Sensors

Marko Eltermann; Sven Lange; Kathriin Utt; Urmas Joost; Ilmar Kink; Valter Kiisk; Ilmo Sildos

doi:10.4028/www.scientific.net/KEM.605.368

Paper Titles

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 605TiO2 Nano-Powders as Potential Low-Temperature...

TiO₂ Nano-Powders as Potential Low-Temperature Optical Gas Sensors

Abstract:

Present work investigates the applicability of nanosized TiO₂ (anatase) as a potential optical sensor material for ambient oxygen below room temperature. Titania nanopowders with grain sizes of 10 and 40 nm are prepared via the sol-gel route and tested for the gas response in water deficit conditions. Both powders exhibit sensitivity against oxygen. At-50 °C 40 nm grain size powder remains sensitive to the ambient changes and the PL output increases ~50% whereas 10 nm grain size powders photoluminescence is quenched.

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Periodical:

Key Engineering Materials (Volume 605)

Pages:

368-371

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.605.368

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Online since:

April 2014

Authors:

Marko Eltermann*, Sven Lange, Kathriin Utt, Urmas Joost, Ilmar Kink, Valter Kiisk, Ilmo Sildos

Keywords:

Gas Sensor, Low Temperature, Optical, Oxygen, Photoluminescence (PL), Rare Earth Ions, Surface Chemistry, TiO₂

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