SYNTHESIS OF SrTiO3 NANOPOWDER BY SOL-GEL- HYDROTHEMAL METHOD FOR GAS SENSING APPLICATION
نویسندگان
چکیده
Strontium titanate (SrTiO3) nanopowder has been synthesized through a sol-gelhydrothermal method. The X-ray diffraction studies of SrTiO3 nanopowder have shown that the asprepared powder was single phase, crystalline, and has a cubic perovskite structure (ABO3) with a lattice constant a = 3.903 Å. The particle size calculated from FWHM was ∼22 nm. SrTiO3 nanopowder was examined using thermo gravimetric analysis; differential thermal analysis and UVvisible 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 H2S based on glass substrate were fabricated successfully by screen-printing INTERNATIONAL JOURNAL ON SMART SENSING AND INTELLIGENT SYSTEMS, VOL. 5, NO. 2, JUNE 2012
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