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Vol. 38 No. 8 (2026): Vol 38, Issue 8 (2026)

Copyright (c) 2026 Sami Abdel Azeem, Karishma V. Shikhare, Amol B. Pandhare, Kranti K. Patil, Swapnajit V. Mulik, Manikandan Ayyar, Chnar H. Aziz, Sadiq. H. Khoreem, Rajendra P. Patil, Walaa Alharbi, Khadijah H. Alharbi , AbdAllah A. Alotibi

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Refinement Rietveld Study of Magnesium-Doped Cobalt Ferrites (MgxCo1-xFe2O4)/Polyol on Dye Adsorptive Removal

https://doi.org/10.14233/ajchem.2026.35757
Karishma V. Shikhare
Department of Chemistry, M.H. Shinde Mahavidyalaya, Tisangi, Kolhapur-416206, India
https://orcid.org/0009-0005-6794-6874
Amol B. Pandhare
Department of Chemistry, M.H. Shinde Mahavidyalaya, Tisangi, Kolhapur-416206, India
https://orcid.org/0009-0004-9844-348X
Kranti K. Patil
Department of Chemistry, Rajaram College, Kolhapur-416408, India
https://orcid.org/0000-0003-3008-0673
Rajendra P. Patil
Department of Chemistry, M.H. Shinde Mahavidyalaya, Tisangi, Kolhapur-416206, India
https://orcid.org/0000-0002-4094-1978
Walaa Alharbi
Department of Chemistry, Science and Arts College, King Abdulaziz University, Rabigh, Saudi Arabia
https://orcid.org/0000-0002-4106-3011
Khadijah H. Alharbi
Department of Chemistry, Science and Arts College, King Abdulaziz University, Rabigh, Saudi Arabia
https://orcid.org/0000-0001-5508-2531
AbdAllah A. Alotibi
Department of Chemistry, College of Science and Humanities, Shaqra University, Ad-Dawadmi 11911, Saudi Arabia
https://orcid.org/0000-0002-7868-0371
Sami M. Abdel Azeem
Department of Chemistry, College of Science and Humanities, Shaqra University, Ad-Dawadmi 11911, Saudi Arabia; Department of Chemistry, Faculty of Science, Fayoum University, Fayoum City, Egypt
https://orcid.org/0000-0002-5185-6672

Corresponding Author(s) : Sami M. Abdel Azeem

sma13@fayoum.edu.eg

Asian Journal of Chemistry, Vol. 38 No. 8 (2026): Vol 38, Issue 8 (2026)

Abstract

The constitution of the soft n-type magnesium ferrite in the hard cobalt ferrite nanoparticles was prepared using the hydrothermal chemical method and varied incrementally in a polyol-supported material. The MgxCo1-xFe2O4 nanoparticles exhibited uniform spherical morphology as observed in SEM analysis, while TEM confirmed well-dispersed particles with sizes ranging from 15 to 20 nm. Three phases of the material viz. Mg0.1Co0.9Fe2O4 (MCF101), Mg0.3Co0.7Fe2O4 (MCF103) and Mg0.5Co0.5Fe2O4 (MCF105) were prepared and utilised for the adsorption removal of methylene blue (MeB) dye from aqueous solution. The adsorption efficiency of 5 mg L–1 MeB ranged from 58-85% at pH 2.0, 50 min of stirring time and 1.0 g L–1 of adsorbent. Results indicated the gradual increase in Mg proportions has led to an enhancement in the removal efficiency in order MCF105, better than MCF103 and finally MCF101. Kinetic studies showed that the experimental results best matched the pseudo-second-order kinetics model and the film diffusion process was a rate-limiting phase. Equilibrium findings were well-fitted by the Langmuir isotherm model, with R2 = 0.986-0.989 and maximal monolayer capacity (qmax) of 148-163 mg g–1. The Freundlich isotherm analysis showed that the adsorption intensity parameter (n) exceeded unity for MCF103 and MCF105 confirmed favourable adsorption on these materials. MCF101, in contrast, exhibited behaviour characteristic of cooperative adsorption. The Temkin isotherm analysis indicated negligible lateral repulsive interactions among the adsorbed species.

Keywords

Magnesium-doped cobalt ferrite Polyol-supported Refinement Rietveld Methylene blue Adsorption
(1)
Shikhare, K. V.; Pandhare, A. B.; Patil, K. K.; Patil, R. P.; Alharbi, W.; Alharbi, K. H.; Alotibi, A. A.; Abdel Azeem, S. M. Refinement Rietveld Study of Magnesium-Doped Cobalt Ferrites (MgxCo1-xFe2O4) Polyol on Dye Adsorptive Removal. ajc 2026, 38, 2076-2088.
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