Zn-doped CoFe2O4Nanoparticles Synthesized Using Ginkgo Biloba Extract: Cation Distribution, Mossbauer Studies and Application for Water Treatment

Mariia Liaskovska,Hanna Ersteniuk,Tetiana Tatarchuk,Volodymyr Kotsyubynsky

doi:10.15330/pcss.22.4.792-803

Abstract

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 Scherrer 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.

Highlights

Nanoparticles attract great interest due to their unique magnetic [1,2], optical [3], electrical [3], adsorption and catalytic [4]properties
XRD analysis Spinel structure of synthesized cobalt-zinc ferrites ferrites has been confirmed by X-ray analysis (Fig.2) and Rietveld refinement (Fig.3)
Cobalt ferrite nanopowders were successfully synthesized by means of the green method, using Ginkgo biloba leaf extract as а еco-friendly fuel agent and reductant

Summary

Introduction

Nanoparticles attract great interest due to their unique magnetic [1,2], optical [3], electrical [3], adsorption and catalytic [4]properties. Spinel nanoparticles may exhibit different sizes depending on synthesis method. They can be used as adsorbents, pigments[5], catalysts[6], [7] and refractory materials. In order to synthesize spinels with high surface area and useful properties, different wet chemistry techniques have been attempted such as co-precipitation [8,9,10], hydrothermal method[4,6,11,12], sol-gel method [13,14,15,16], sonochemical method[6], ultrasound irradiation etc. Different fuel agents are used such as citric acid, benzyl alcohol, polyvinyl alcohol, ethylene glycol [17,18,19,20], which act as ligands and reactants during the synthesis for sol-gel synthesis of spinel NPs

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Results

Conclusion