Preparation of Non-stoichiometric Zinc Ferrite/Magnetite [(ZnxFe1- x)O.Fe2O3] Nanoparticles: Adsorption and Biological Activity

Document Type : Original Article


1 Catalysis and Surface Chemistry Lab., Physical Chemistry Dept. Inorganic Chemical Industries and Mineral resources Division National Research Center El Behoos St., Dokki - Cairo - Egypt postal code 12622 Assoc. Prof.,Chemistry

2 Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi 42 Arabia. Physical Chemistry Department, Faculty of Women for Art, Science and Education, 44 Ain Shams University, Cairo, Egypt

3 National Research Centre


Magnetic nanomaterials especially ferrites are gaining more interest recent years for environmental and biomedical applications. The preparation of non-stoichiometric zinc ferrite nanoparticles [(ZnxFe1-x)O•Fe2O3] was achieved by a modified co-precipitation route . The obtained samples were characterized by Scanning electron microscopy (SEM), X-ray diffraction (XRD), and Vibrating Sample Magnetometer (VSM). All samples have crystallite sizes in the range of 3-7 nm. The hysteresis curves for magnetic properties showed a very low coercivity tending to zero for pure ZnFe2O4. This behavior is attributed to the crystallite size which is smaller than that of a single domain. The prepared samples were evaluated upon removal of Alizarin yellow dye and various parameters for the adsorption process were studied. The adsorption process showed high removal efficiency, which reached to 93% in the case of the zinc ferrite sample with maximum zinc molar ratio. The removal efficiency was found to increase with increasing molar ratio of Zn. The obtained nanopowders were also tested for their antimicrobial activity against Gram-negative bacteria, Gram-positive bacteria, and pathogenic yeast. The sample with the highest molar ratio of zinc showed potent antimicrobial activity against Bacillus cereus, Staphylococcus aureus, and Candida albicans. The ZnFe2O4 sample is considered a promising antimicrobial agent.


Main Subjects

Volume 65, Issue 131 - Serial Number 13
Special Issue: Chemistry and Global Challenges (Part A)
December 2022
Pages 185-197
  • Receive Date: 22 April 2022
  • Revise Date: 28 June 2022
  • Accept Date: 17 July 2022