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SYNTHESIS OF SrTiO3 NANOPOWDER BY SOL-GEL-HYDROTHEMAL METHOD FOR GAS SENSING APPLICATION.
- Source :
- International Journal on Smart Sensing & Intelligent Systems; Jun2012, Vol. 5 Issue 2, p382-400, 19p, 1 Color Photograph, 1 Chart, 8 Graphs
- Publication Year :
- 2012
-
Abstract
- Strontium titanate (SrTiO<subscript>3</subscript>) nanopowder has been synthesized through a sol-gel-hydrothermal method. The X-ray diffraction studies of SrTiO<subscript>3</subscript> nanopowder have shown that the as-prepared powder was single phase, crystalline, and has a cubic perovskite structure (ABO<subscript>3</subscript>) with a lattice constant a = 3.903 Å. The particle size calculated from FWHM was ∼22 nm. SrTiO<subscript>3</subscript> nanopowder was examined using thermo gravimetric analysis; differential thermal analysis and UV-visible absorption spectroscopy. The transmission electron microscopic investigations have shown that the particle size of the as-prepared powder has a mean size of 34 nm. Then highly sensitive and selective sensors to H<subscript>2</subscript>S based on glass substrate were fabricated successfully by screen-printing technique. Sensitivity, selectivity, response time, and recovery time of the sensors were systematically investigated as a function of operating temperature, using H<subscript>2</subscript>S, CO, CO<subscript>2</subscript>, H<subscript>2</subscript>, Cl<subscript>2</subscript>, LPG, C<subscript>2</subscript>H<subscript>2</subscript>OH, O<subscript>2</subscript>, NH<subscript>3</subscript> and NO<subscript>2</subscript> as test gases. The sensitivity was found to lie below and around the ppm level for H<subscript>2</subscript>S gas at 150 °C. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11785608
- Volume :
- 5
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- International Journal on Smart Sensing & Intelligent Systems
- Publication Type :
- Academic Journal
- Accession number :
- 82357871
- Full Text :
- https://doi.org/10.21307/ijssis-2017-487