Decolorization of methylene blue by silver/reduced graphene oxide-ethylene diamine nanomaterial: synthesis, characterization, and optimization.

Autor: Ecer Ü; Department of Chemical Engineering, Institute of Natural and Applied Sciences, Van Yuzuncu Yil University, 65080, Van, Turkey. umitecer@gmail.com., Yiğit A; The Research Laboratory Application and Research Center, Igdir University, Igdir, Turkey., Menges N; Department of Biomedical Engineering, Faculty of Engineering, Necmettin Erbakan University, 42100, Konya, Turkey., Şahan T; Department of Chemistry, Faculty of Science, Van Yuzuncu Yil University, 65080, Van, Turkey.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2024 Jul; Vol. 31 (31), pp. 43852-43864. Date of Electronic Publication: 2024 Jun 23.
DOI: 10.1007/s11356-024-33986-4
Abstrakt: In this study, ethylene diamine-coated reduced graphene oxide-supported silver composite (Ag/rGO-ED) was synthesized and used as an efficient catalyst for the decolorization of methylene blue (MB) in the presence of NaBH 4 . The morphology of the obtained material was elucidated using field emission scanning electron microscopy (FE-SEM), Fourier-transform infrared spectroscopy (FTIR), energy-dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. The influences of four parameters (MB concentration (mg/L), NaBH 4 amount (mM), catalyst amount (g/L), and contact time (s)) on the decolorization process were appraised and optimized via response surface methodology (RSM). For the decolorization of MB, the optimum solutions were obtained as C o of 32.49 mg/L, NaBH 4 amount of 152.89 mM, catalyst amount of 0.83 g/L, and 101.39 s contact time with MB decolorization efficiency of 97.73%. MB, a pollutant in wastewater, was decolorized rapidly by Ag/rGO-ED with an efficiency of approximately 97%. The exploration of kinetics and thermodynamics was another major emphasis of the work. The activation energy (E a ) and rate constant (k) for the decolorization of MB were obtained as 37.9 kJ/mol and 0.0135 s -1 , respectively. The obtained results show that the catalyst, a new composite material in the literature, is promising for decolorization of wastewater.
(© 2024. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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