چكيده به لاتين
Abstract:
In this research, nanostructures of ZnMoO4, NiMoO4 and NixZn1-xMoO4 were synthesized by mechanochemical method, and also Zn3Mo2O9 was synthesized by ultrasound method. We used the available starting materials including ammonium hepta molybdate, nickel nitrate and zinc nitrate as the metal sources and acetamide, glucose, glycine and yeast as the ligands and also fuels and ammonium nitrate as the oxidizer for the synthesis of the metal molydates in nano scale. With using these starting materials, named metal molybdate, were synthesized with the morphology of such as nanosheet structures, cubic-like nanoparticles, lace-shaped, porous network with single particles and fine agglomerated nanoparticles. The optical properties of the products were studied by calculating the band gap energy. Then, the nanostructures were investigated for the catalyst degradation of malachite green (MG) and crystal violet (CV). Among the synthesized samples, degradation of malachite green and crystal violet were observed in a short time by two compounds of ZnMoO4 and Ni0.25Zn0.75MoO4 with high removal efficiency in visible light. The employed processes (mechanochemical and ultrasound) are facile, economical and safe methods, which are called as green methods. The obtained nanostructures were characterized by using Fourier transform infrared (FT-IR), X-ray diffraction (XRD), energy dispersive X-ray (EDX) and scanning electron microscopy (SEM). The band gap energy of the samples was obtained by DRS spectra.
Keywords: mixed metal oxides, nanostructure, optical properties, mechanochemical method, ultrasound