Synthesis and characterisation of nanosized TiO2–ZrO2 binary system prepared by an aqueous sol–gel process: Physical and sensing properties

摘要: Abstract Nanostructured TiO 2 –ZrO thin films and powders were prepared by a straightforward aqueous particulate sol–gel route. Titanium (IV) isopropoxide zirconium acetate hydrate used as precursors, hydroxypropyl cellulose was polymeric fugitive agent in order to increase the specific surface area. X-ray diffraction (XRD) Fourier transform infrared (FTIR) spectroscopy revealed that powder crystallised at low temperature of 500 °C, containing anatase-TiO tetragonal-ZrO phases. Furthermore, it found ZrO retarded anatase-to-rutile transformation up 900 °C. The activation energies for crystallite growth components binary system calculated 10.16 3.12 kJ/mol, respectively. Transmission electron microscope (TEM) image showed one smallest sizes obtained mixed oxide, being 5 nm 500 °C. Field emission scanning (FESEM) analysis deposited had nanostructured morphology with average grain size 20 nm 500 °C 36 nm Thin produced under optimised conditions excellent microstructural properties gas sensing applications. They exhibited remarkable response towards concentrations CO NO gases operating 150 °C, resulted an thermal stability well decrease power consumption. calibration curves sensor follows law, S  =  A [ ] B (where is response, coefficients are constants concentration) two types gases, has capability detection concentrations.