CMCFO-Cr0.1 Nanoferrites: Sol-gel Synthesis, Structural, and Magnetic Studies: Applications for Photodegradation of Congo Red Dye

Document Type : Articles


1 Laboratory of Physical Chemistry of Materials, Faculty of Sciences of Monastir, University of Monastir, 5019 Monastir, Tunisia

2 Department of Biotechnology, Research Institute of Modern Biological Techniques (RIMBT), University of Zanjan, Zanjan 45371-38791, Iran

3 Trita Nanomedicine Research Center (TNRC), Zanjan Health Technology Park, Postal code 45156-13191, Zanjan, Iran

4 Department of Chemistry, Faculty of Science, University of Zanjan, 45371-38791 Zanjan, Iran

5 Laboratoire des Matériaux, Organisation et Propriétés, Faculté des Sciences de Tunis, Tunisia


One of the foremost inescapable impediments that industrial sectors face is to remove organic pollutants, which affected nature and threatened the existence of species per se. Nanoscale magnetic ferrites are considerable materials for removing the majority of organic dyes due to their unique properties and high potential photocatalytic activity. Their photocatalytic performance in semiconductor nanocrystals has also received many enthusiasts over the last couple of years.  Changing nanoferrites’ architectural building blocks and increasing their bandgap energy may improve their photocatalytic peculiarities.  In the present investigation, we have studied nanoscale magnetic ferrites with Co0.4Mg0.4Cu0.2Fe1.9Cr0.1O4, (CMCFO-Crx, x= 0.1) formula. CMCFO-Crx has synthesized via sol- gel approach. The synthesized nanoparticles were characterized  by XRD, SEM, UV-vis analysis, and magnetic measurement, revealing the cubic spinel structure with space group Fd-3m (N° 277), average size between 20 and 60 nm, higher bandgap energy and saturation magnetization (446 emu/g) in the presence of transition metals. The results demonstrated in CMCFO-Crx (x=0.1) compound, the Curie temperature decreases to 446 K by the substitution of Fe3+ by Cr3+ ions. The synthesized powder nanoferrites efficiently degraded the Congo Red (CR) dye (84 %) under UV irradiation, for which the most probable degradation pathway is proposed. The recyclability test exhibited the nanoscale magnetic ferrites catalysts are sensibly efficient, stable, and facile recoverable by an external magnet. Thus, the CMCFO-Crx compounds can be an applicable catalyst in wastewater treatment.

Graphical Abstract

CMCFO-Cr0.1 Nanoferrites: Sol-gel Synthesis, Structural, and Magnetic Studies: Applications for Photodegradation of Congo Red Dye


  • CMCFO-Cr1 Nanoferrites synthesized through simple and facile Sol-gel technique.
  • Synthetic Nanoferrites were characterized by XRD.
  • Magnetic peculiarities of the Nanoferrites were investigated.
  • The prepared Nanoferrites were applied for photodegradation of Congo Red Dye.
  • The effects of various factors such as Effect of light, Influence of catalyst dose, and Influence of irradiation time onphotocatalytic activities of these Nanoferrites were comprehensively investigated.


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Volume 12, Issue 1
March 2022
Pages 97-106
  • Receive Date: 18 November 2021
  • Revise Date: 07 February 2022
  • Accept Date: 14 February 2022
  • First Publish Date: 01 March 2022