TUNGSTEN-DOPED TiO2 NANOLAYERS WITH IMPROVED CO2 GAS SENSING PROPERTIES FOR ENVIRONMENTAL APPLICATIONS

Maliheh Saberi and Ali Akbar Ashkarran
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Maliheh Saberi: Department of Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran
Ali Akbar Ashkarran: Department of Physics, Faculty of Basic Sciences, University of Mazandaran, Babolsar, Iran

Surface Review and Letters (SRL), 2017, vol. 24, issue Supp02, 1-10

Abstract: Tungsten-doped TiO2 gas sensors were successfully synthesized using sol–gel process and spin coating technique. The fabricated sensor was characterized by field emission scanning electron microscopy (FE-SEM), ultraviolet visible (UV–Vis) spectroscopy, transmission electron microscopy (TEM), X-Ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. Gas sensing properties of pristine and tungsten-doped TiO2 nanolayers (NLs) were probed by detection of CO2 gas. A series of experiments were conducted in order to find the optimum operating temperature of the prepared sensors and also the optimum value of tungsten concentration in TiO2 matrix. It was found that introducing tungsten into the TiO2 matrix enhanced the gas sensing performance. The maximum response was found to be (1.37) for 0.001g tungsten-doped TiO2 NLs at 200∘C as an optimum operating temperature.

Keywords: Tungsten-doped TiO2; sol–gel; gas sensors; CO2 (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1142/S0218625X18500245

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