Zn-doped CoFe2O4 Nanoparticles Synthesized Using Ginkgo Biloba Extract: Cation Distribution, Mossbauer Studies and Application for Water Treatment

The cobalt-zinc ferrites Zn1-xCoxFe2O4 (where x=0; 0.2; 0.4; 0.6; 0.8; 1.0) were obtained by green synthesis using Ginkgo Biloba extract as reductant and fuel. The cation distribution of the spinel ferrites has been investigated by means of X-ray diffraction and Mossbauer spectroscopy. The surface morphology and elemental composition were analyzed by SEM and EDS. The crystallite size decrease with increasing Co2+ content calculated from S cherrer equation and Williamson-Hall method. Adsorption properties of the spinel system were investigated using Congo Red (CR) dye as model pollutant. It is concluded that the adsorption of Congo red dye molecules can occur due to electrostatic and donor-acceptor interactions with the adsorbent surface containing various amount of active centers.

Automated summary

Cobalt-zinc ferrites were synthesized using Ginkgo Biloba extract as reductant and fuel, with varying Co2+ content affecting crystallite size and adsorption properties. X-ray diffraction and Mossbauer spectroscopy were used to investigate structure and cation distribution, while SEM and EDS were utilized to analyze surface morphology and elemental composition. Adsorption of Congo Red dye was found to occur due to electrostatic and donor-acceptor interactions with the surface of the adsorbent containing active centers.