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Efficient adsorption of organic dyes using Fe3O4/carbon sphere nanocomposites: Synthesis and performance evaluation

Ta Duc KhueFaculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet NamPham Kim NgocFaculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet NamDo Thanh VietAcademy of Military Science and Technology, Hanoi, 10000, Viet NamTrần Đăng ThànhInstitute of Materials Science, Vietnam Academy of Science and Technology, Hanoi, 10000, Viet NamTuan Hong NguyenCenter for High Technology Development, Vietnam Academy of Science and Technology, Hanoi, 10000, Viet NamPhạm Văn VĩnhFaculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology, 144 Xuan Thuy Road, Cau Giay District, Hanoi, 100000, Viet NamDinh Lam NguyenFaculty of Engineering Physics and Nanotechnology, VNU-University of Engineering and Technology, 144 Xuan Thuy Road, Cau Giay District, Hanoi, 100000, Viet NamPham Duc ThangFaculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet NamAnh Tuan DuongFaculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet NamRaja DasFaculty of Materials Science and Engineering, Phenikaa University, Hanoi, 12116, Viet NamHữu Tuấn NguyễnFaculty of Electrical and Electronic Engineering, Phenikaa University, Hanoi, 12116, Viet Nam

2025en

ABI

Annotatsiya

This study reports the synthesis of Fe 3 O 4 /carbon sphere (CS) nanocomposites via a solvothermal method followed by co-precipitation for the efficient adsorption of organic dyes. The structural and morphological characteristics of the nanocomposites were analyzed using scanning electron microscope, X-ray diffraction, and energy-dispersive X-ray spectroscopy, confirming the successful integration of Fe 3 O 4 nanoparticles onto the CS surface. Adsorption kinetics followed the pseudo-second-order model, suggesting chemisorption as the primary mechanism for methylene blue (MB) and rhodamine B (RB) dye removal. The adsorption process aligned well with the Langmuir isotherm model, with optimized nanocomposites achieving nearly 100 % removal of MB and RB within just 5 min. In contrast, Fe 3 O 4 nanoparticles showed poor adsorption, removing less than 10 % of MB and 24 % of RB after 120 min, whereas CS removed 93.5 % of MB and 73 % of RB in the same timeframe. Featuring strong magnetic properties for easy separation, high stability, and exceptional adsorption efficiency, Fe 3 O 4 /CS nanocomposites emerge as promising reusable adsorbents for wastewater treatment.

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DOI: 10.1016/j.jsamd.2025.100880

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