{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T16:02:39Z","timestamp":1790697759629,"version":"4.1.0"},"reference-count":30,"publisher":"MDPI AG","issue":"19","license":[{"start":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:00:00Z","timestamp":1790640000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Ministry of Science and Higher Education of Russia","award":["FENW-2024-0001"],"award-info":[{"award-number":["FENW-2024-0001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>This paper examines the formation of cobalt (II) ferrite on the surface of an organic support in stages: mixing metal salts, interaction with ammonia and citric acid solutions, and the subsequent thermolysis of the intermediate products. The resulting materials were characterized by X-ray diffraction, electron microscopy, and elemental analysis. A comparative analysis of the materials\u2019 morphological properties suggests the formation of a cobalt (II) ferrite film on the surface of the organic support. This film forms as small cubic crystals measuring 50\u2013100 nm in size, with a simultaneous significant (2\u20135 times) increase in the specific surface area of the synthesized composite materials compared to the support surface. The typical pore diameter of the composites is 20\u201340 nm. The synthesized material of CoFe2O4\/sunflower husk biochar exhibits high catalytic activity; dye is removed from the solution within 60 min. The material of CoFe2O4\/sunflower husk ash is less active in this process: dye removal is observed 140 min after the start of the reaction. These data may be useful for developing catalytically active materials for wastewater and soil solution treatments to remove persistent pollutants.<\/jats:p>","DOI":"10.3390\/molecules31193482","type":"journal-article","created":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T15:14:37Z","timestamp":1790694877000},"page":"3482","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Cobalt (II) Ferrite-Based Organic\u2013Inorganic Composite Material Formation and Its Properties"],"prefix":"10.3390","volume":"31","author":[{"given":"Alexander Vladimirovich","family":"Vyaltsev","sequence":"first","affiliation":[{"name":"Department of Ecology and Industrial Safety, Platov South-Russian State Polytechnic University (NPI), 346428 Novocherkassk, 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J."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"100405","DOI":"10.1016\/j.nxnano.2026.100405","article-title":"Hydrothermal synthesis and multifunctional characterization of cobalt ferrite\u2013rGO nanocomposites for theranostic applications","volume":"9","author":"Rayhan","year":"2026","journal-title":"Next Nanotechnol."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"174272","DOI":"10.1016\/j.jmmm.2026.174272","article-title":"Probing thermal diffusivity in cobalt ferrite\/PVA nanofluids by varying solvent composition","volume":"655","author":"John","year":"2026","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"16622","DOI":"10.1039\/D6RA00652C","article-title":"Preparation and microwave absorption mechanism of cobalt ferrite\/coal slime-based carbon composites","volume":"16","author":"Si","year":"2026","journal-title":"RSC Adv."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"140265","DOI":"10.1016\/j.matlet.2026.140265","article-title":"Multiphase Interface and component synergism: Electromagnetic wave absorption mechanism of Gd-doped cobalt ferrite\/coal slime-based carbon composites","volume":"410","author":"Si","year":"2026","journal-title":"Mater. Lett."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"113960","DOI":"10.1016\/j.diamond.2026.113960","article-title":"Manganese-doped cobalt ferrite\/reduced graphene oxide (MnxCo1-xFe2O4\/rGO) modified glassy carbon electrochemical sensor for paracetamol detection","volume":"168","author":"Ilyas","year":"2026","journal-title":"Diam. Relat. Mater."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"117853","DOI":"10.1016\/j.sna.2026.117853","article-title":"Sustainable cobalt ferrite nanostructure sensor for trace-level mesalamine detection","volume":"405","author":"Kiran","year":"2026","journal-title":"Sens. Actuators A Phys."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"118523","DOI":"10.1016\/j.microc.2026.118523","article-title":"Silver-doped cobalt ferrite nanowires (Ag:CoFe2O4) as high-sensitivity non-enzymatic electrochemical biosensors for glucose detection in diabetic serum","volume":"227","author":"Umar","year":"2026","journal-title":"Microchem. J."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"153800","DOI":"10.1016\/j.ijhydene.2026.153800","article-title":"Noble-metal-free hydrogen sensor based on cobalt-doped zinc ferrite\/reduced graphene oxide for room-temperature operation with wide concentration detection","volume":"216","author":"Azmoodeh","year":"2026","journal-title":"Int. J. Hydrog. Energy"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"35135","DOI":"10.1016\/j.ceramint.2026.06.047","article-title":"Structural; magneto dynamic; electrical; and dielectric attributes of silver-doped cobalt ferrite (AgxCo1-xFe2O4) fabricated via sol-gel auto-combustion","volume":"52","author":"Singh","year":"2026","journal-title":"Ceram. Int."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"123011","DOI":"10.1016\/j.est.2026.123011","article-title":"Electrochemical evaluation and profiling of 3D self-assembled mesoporous mixed ternary nickel-cobalt based ferrite microspheres for advanced electrochemical energy storage\/conversion applications","volume":"172","author":"Saha","year":"2026","journal-title":"J. Energy Storage"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"174059","DOI":"10.1016\/j.jmmm.2026.174059","article-title":"Analysis of near-infrared magneto-optic spectra of cobalt-ferrite nanocomposite materials: Evidence of a novel magneto-optic transition","volume":"648","author":"Dadoenkova","year":"2026","journal-title":"J. Magn. Magn. Mater."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"101662","DOI":"10.1016\/j.nanoso.2026.101662","article-title":"Green-synthesised Cu-doped cobalt ferrite nanoparticles using Azadirachta indica leaf extract for photocatalytic and antibacterial applications","volume":"46","author":"Rao","year":"2026","journal-title":"Nano-Struct. Nano-Objects"},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"114923","DOI":"10.1016\/j.jphotochem.2023.114923","article-title":"Construction of heteropolyacid-anchored magnetic g-C3N4\/Fe3O4@polyindole hybrids for efficient photocatalytic destruction of methyl orange and bacteria","volume":"444","author":"Elaibi","year":"2023","journal-title":"J. Photochem. Photobiol. A Chem."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"102721","DOI":"10.1016\/j.nxmate.2026.102721","article-title":"Heterogeneous Fe\/Zn-exchanged clinoptilolite catalyst synthesized by solid-state ion exchange: Fenton-photocatalyst synergy and investigation of operational parameters for photo-Fenton degradation of methyl orange","volume":"13","author":"Abdulkarim","year":"2026","journal-title":"Next Mater."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"105103","DOI":"10.1016\/j.eti.2026.105103","article-title":"Acetalized amidoxime-functionalized polyvinyl formal\/polyamidoxime (PVF\/PAO) fibers as robust supports for plasmonic Ag nanoparticles: Solar photocatalytic degradation of methyl orange and antibacterial activity","volume":"43","author":"Yan","year":"2026","journal-title":"Environ. Technol. Innov."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"117173","DOI":"10.1016\/j.optmat.2025.117173","article-title":"Investigating the kinetic models governing the photodecomposition of methyl orange by two-dimensional magnetic photocatalysts","volume":"166","author":"Abbasi","year":"2025","journal-title":"Opt. Mater."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1016\/j.jre.2025.04.017","article-title":"Excellent enhanced photocatalytic degradation of methyl orange and methylene blue by Gd-substituted LaMn0.9Zn0.1O3","volume":"44","author":"Naghavi","year":"2026","journal-title":"J. Rare Earths"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1016\/j.nanoms.2023.10.007","article-title":"A novel \u201cSnowflake\u201d--rGO-CuO for ultrasonic degradation of rhodamine and methyl orange","volume":"6","author":"Wang","year":"2024","journal-title":"Nano Mater. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"42327","DOI":"10.1016\/j.ceramint.2026.07.132","article-title":"Experimental and theoretical analysis of Dy-doped cobalt ferrites: Correlating structural, morphological, optical, and magnetic properties","volume":"52","author":"Thirupathi","year":"2026","journal-title":"Ceram. Int."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"240313","DOI":"10.1016\/j.jpowsour.2026.240313","article-title":"Cobalt induced cationic redistribution and electron hopping in mixed spinel ferrite nanoarchitectures for efficient alkaline hydrogen evolution","volume":"681","author":"Sameera","year":"2026","journal-title":"J. Power Sources"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"441","DOI":"10.9767\/bcrec.20548","article-title":"Photocatalytic Activity of ZnO\/Hydroxyapatite Nanocomposite for Remazol Red RB Removal in Aqueous Solution Under UV and Visible Light Irradiation","volume":"21","author":"Sastrawidana","year":"2026","journal-title":"Bull. Chem. React. Eng. Catal."},{"key":"ref_29","doi-asserted-by":"crossref","unstructured":"Shabelskaya, N., Sulima, S., Sulima, E., Medennikov, O., Kulikova, M., Kolesnikova, T., and Sushkova, S. (2023). Study of the Possibility of Using Sol\u2013Gel Technology to Obtain Magnetic Nanoparticles Based on Transition Metal Ferrites. Gels, 9.","DOI":"10.3390\/gels9030217"},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"117999","DOI":"10.1016\/j.mseb.2025.117999","article-title":"Investigations on the structure, magnetism, electricity, and electrochemistry of copper-doped manganese ferrite: Sol-gel technique","volume":"313","author":"Kogulakrishnan","year":"2025","journal-title":"Mater. Sci. Eng. 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