چكيده به لاتين
In this research, at first SiO2/ZrO2, ZrO2/TiO2 and SiO2/ZrO2/TiO2 nanoparticles were synthesized and characterized using facile, rapide, low cost and self cumbostion reaction with the help of microwave radiation in solid state. Then synthesized SiO2/ZrO2/TiO2 mixed metal oxide composite with graphene oxide by ultrasound method. Structure and morphology of the producst were characterized using FT-IR (Fourier Transform Iinfrared Spectroscopy), XRD (X Ray Diffraction), SEM (Scanning Electron Microscope), EDX (Energy Dispersive X ray), )TEM (Transmission Electron Microscopy and Mapping analysis. Results showed the formation of pure phase SiO2/ZrO2/TiO2/GO nanocomposite with uniform particulate morphology with an average particle size of 40-75 nm. Also, optical and photocatalytic properties of synthesized products were studied by DRS (Diffuse Reflection Spectroscopy) and UV-vis spectra. Band gap energy of the final product was calculated about 2.76 eV. Photocatalytic properties of synthesized products were studied comparatively with degration of Rhodamine B dye in the water environment under light illumination for 4 hours.
The most removal efficiency to remove RhB from water solution was obtained for SiO2/ZrO2/TiO2 composite with graphene oxide by degration of 96%.
Also, pseudo super capacitor behavior of products was investigated by CV (cyclic voltammetry) , LSV (linear sweep voltammetry) and EIS (electrochemical impedance spectroscopy) tests in H2SO4 0.5 M environment at potential scan rate of (0.01-0.1 Vs-1).
The results obtained from oxidation-reduction CV curves showed high pseudo super capacitor behavior with a specific capacitance of 1700 Fg-1 and increase in conductive current for SiO2/ZrO2/TiO2/GO which can offer this product as a candidate for application in supercapacitor and energy storage systems.
Keywords: Mixed metal oxide, Nanoparticles, Microwave, Photocatalyst, Electrochemical and Pseudo super capacitor.
