چكيده به لاتين
In recent years, zinc oxide has attracted a lot of attention for photocatalytic application due to its unique properties such as large exciton binding energy, wide band gap energy (3.37eV), easy control of particle shape and low cost. In this study, zinc oxide nanoparticles were initially synthesized by using citric acid as a fuel in various amounts of pH and conventional and microwave combustion methods. Furthermore, the synthesis of zinc oxide nanoparticles was performed using various amounts of mixed glycine-citric acid fuel (φ=0.5,1,1.5 and 2) in the presence (open system) and absence (closed system) of air oxygen. Finally, zinc oxide-cobalt ferrite nanocamposites were synthesized by solution combustion method and reduced graphene oxide (20%) was used in order to improve photocatalytic activity of nanocamposite. The synthised powder were characterised by FTIR, DTA/TGA, XRD, SEM, TEM, PL spectra, UV–Vis diffuse reflectance spectra, UV–Vis spectra and Raman spectra. About 85 % of MB dye was photodegraded during 60 min UV irradiation by the as-combusted ZnO powders at φ=1 in closed system and zinc oxide-5% wt. % cobalt ferrite-20% wt. % reduced graphene oxide nanocamposite photodegraded 30% of MB during 3 hours UV irradiation.
Keywords: Zinc oxide, Solution combustion synthesis, Photocatalytic performance
