Fabrication of Multifunctional (Co2+x Fe2+1-x)(Al3+yFe3+2-y)O4 Ferrite @Graphene Oxide@Titania and Its Biological Activities

Abstract

Recently, a variety of metal oxide-based nanomaterial has been integrated in several applications and achieved excellent performances on cyclic capacitor, antibacterial, antifungal and antioxidant activities. Titania doped cobalt aluminium ferrite fabricated graphene oxide based nanocomposites have received much attention. In this work, cobalt aluminium ferrite (Co2+xFe2+1-x)(Al3+yFe3+2-y)O4@ graphene oxide@titania nanocomposite was prepared at different ratios exhibiting the enhanced properties. Initally, the ferrite nanoparticles (Co2+xFe2+1-x)(Al3+yFe3+2-y)O4 spinal (0 ≤ x and y ≥ 2) (x = 0, 0.2, 0.4, 0.6, 0.8, 1.0 and y = 1.0, 0.8, 0.6, 0.4, 0.2, 0) powder were synthesized by substitution of A- and B-sites via sol-gel method using citrate as precursor. The obtained powder was calcined at 800 ºC for 4 h. The coating of graphene oxide was done through solvothermal hydrolysis and powder obtained was calcined at 600 ºC for 2 h followed by the second coating of titania was also performed similarly. The obtained multifuntional ferrite also showed potential antibacterial activity against Gram-negative bacteria (Escherichia coli) as well as Gram-positive bacteria (Staphylococcus aureus). The synthesized multifaceted spinal ferrites also showed moderate antioxidant activity of 59%.