Ultrasound-Assisted Deposition and Supercritical Reduction of Graphene Oxide on θ-Al2O3 Microspheres for Selective Adsorption of Methylene Blue

Ibragimova, V.; Mitiushev, N.; Kozlova, L.; Sapkov, I.; Shatalova, T.; Efremova, E.; Kozerozhets, I.; Ioni, Y.V.

Авторы: Ibragimova Viktoria, Mitiushev Nikita, Kozlova Lyubov’, Sapkov Ivan, Shatalova Tatyana, Efremova Ekaterina, Kozerozhets Irina, Ioni Yulia V.
Журнал: Journal of Composites Science
Том: 10
Номер: 1
Год издания: 2026
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 31
Последняя страница: 31
DOI: 10.3390/jcs10010031
Аннотация: A composite based on θ-Al2O3 microspheres coated with graphene oxide (GO) and reduced graphene oxide (RGO) was prepared and evaluated as a sorbent for the removal of synthetic dyes from aqueous solutions. GO was synthesized by a modified Hummers’ method and deposited onto alumina microspheres via ultrasound-assisted treatment under various conditions, followed by supercritical reduction to obtain the Al2O3_RGO composite. The structure, morphology, and composition of the materials were characterized by Raman spectroscopy, SEM, TGA/DSC, FTIR, and XRD, revealing the formation of mono- and few-layer GO/RGO coatings on the substrate surface. Adsorption tests for cationic methylene blue (MB) dye and anionic methyl orange (MO) dye demonstrated that the alumina substrate was inactive, whereas GO- and RGO-coated microspheres exhibited high adsorption efficiency for MB and partial uptake of MO from water solutions. In mixed-dye solutions, both Al2O3_GO and Al2O3_RGO composites showed selectivity toward MB, and the RGO-based composite demonstrated enhanced MB adsorption at low concentrations. The results highlight GO/RGO-coated θ-Al2O3 microspheres as convenient and selective composite sorbents for water purification processes.
Добавил в систему: Митюшев Никита Дмитриевич

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Ultrasound-Assisted Deposition and Supercritical Reduction of Graphene Oxide on θ-Al2O3 Microspheres for Selective Adsorption of Methylene Blueстатья Исследовательская статья

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