doi: 10.18178/ijesd.2025.16.4.1536
High-Performance Photocatalytic Degradation of Methylene Blue Dye by NiO-Integrated Bentonite/Fe₃O₄
Fahma Riyanti1,*
,
Hasanudin2 ,
Addy Rachmat2 ,
Muharni2 ,
Eddy Ibrahim3 ,
Poedji Loekitowati Hariani2,*
- 1Doctoral Program of Mathematics and Natural Sciences, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Ogan Ilir, Indonesia
- 2Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Sriwijaya, Ogan Ilir, Indonesia
- 3Department of Mining Engineering, Faculty of Engineering, Universitas Sriwijaya, Ogan Ilir, Indonesia
- Manuscript receivedFebruary 6, 2025
- revisedMarch 19, 2025
- acceptedApril 30, 2025
- publishedAugust 5, 2025
Abstract
Environmental pollution from wastewatercontaining dyes has emerged as a significant issue, necessitatingresearch to identify effective catalysts to address this problem.The present study investigation generated abentonite/Fe₃O₄@NiO composite as a photocatalyst for thedegradation of Methylene blue dye. The composite wasexamined utilizing X-Ray Diffraction (XRD), ScanningElectron Microscope with Energy-Dispersive X-raySpectroscopy (SEM-EDX), UV-vis Diffuse ReflectanceSpectroscopy (UV-DRS), Vibrating Sample Magnetometer(VSM), and Fourier Transform Infrared Spectroscopy (FTIR).The bentonite/Fe₃O₄@NiO composite exhibits magneticproperties by a saturation magnetization value of 51.02 emu/g.With a low band gap of 1.96 eV, this composite is active in thevisible light region. NiO supported on bentonite/Fe₃O₄ enhancesdegrading efficiency relative to bentonite/Fe₃O₄. Thedegradation efficiency attained 99.35% under visible lightirradiation with optimal conditions: 0.05 g of catalyst, 20 mg/LMethylene blue dye concentration, pH 8, and an irradiationtime of 75 min. The photocatalytic degradation adhered to thepseudo-first-order model. The bentonite/Fe₃O₄@NiO compositeexhibited remarkable stability, with an efficiency reduction ofmerely 5.71% after five reuse cycles. This photocatalyst couldpotentially be utilized in the remediation ofwastewater-containing dyes.
Keywords
- Bentonite/Fe3O4@NiO composite
- photocatalyst
- degradation
- visible light
- methylene blue dye
How to Cite
Fahma Riyanti, Hasanudin, Addy Rachmat, Muharni, Eddy Ibrahim, and Poedji Loekitowati Hariani, "High-Performance Photocatalytic Degradation of Methylene Blue Dye by NiO-Integrated Bentonite/Fe₃O₄," International Journal of Environmental Science and Development, vol. 16, no. 4, pp. 286-292, 2025. https://doi.org/10.18178/ijesd.2025.16.4.1536
Copyright & License
Copyright © 2025 by the authors. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).