Simultaneous biosynthesis of reduced graphene oxide-Ag-Cu2O nanostructures by lichen extract for catalytic reduction of textile dyes

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Ciplak Z., Getiren B., Gokalp C., Atila Dinçer C., Yıldız A., Yıldız N.

KOREAN JOURNAL OF CHEMICAL ENGINEERING, vol.37, no.12, pp.2216-2224, 2020 (SCI-Expanded)

• Publication Type: Article / Article
• Volume: 37 Issue: 12
• Publication Date: 2020
• Doi Number: 10.1007/s11814-020-0640-0
• Journal Name: KOREAN JOURNAL OF CHEMICAL ENGINEERING
• Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
• Page Numbers: pp.2216-2224
• Keywords: Metal, Metal Oxide Nanostructures, Reduced Graphene Oxide (rGO), Cetraria islandica (L, ) Ach, Extract, Green Synthesis, Catalytic Reduction, GREEN SYNTHESIS, HIGH-PERFORMANCE, LEAF EXTRACT, NANOPARTICLES, NANOCOMPOSITE, 4-NITROPHENOL, AG, AU, DEGRADATION, FABRICATION
• Ankara University Affiliated: Yes

Abstract

Metal/metal oxide nanostructures based reduced graphene oxide (LrGO-Ag, LrGO-Cu2O, LrGO-Ag-Cu2O) nanocomposites were obtained via green method using Cetraria islandica (L.) Ach. lichen extract. Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning electron microscope energy-dispersive X-ray spectroscopy (SEM-EDX), ultraviolet-visible (UV-Vis) spectroscopy, X-ray diffraction (XRD) and X-ray photo-electron spectroscopy (XPS) were performed to analyze the prepared nanostructures. The results indicated that the nanocomposites were synthesized effectively and Ag-Cu2O nanoparticles with the mean diameter of 27 nm were well dispersed on the LrGO. The conversion of methylene blue (MB) to Leuco Methylene Blue (LMB) and 4-Nitrophenol (4-NP) to 4-Aminophenol (4-AP) was performed by biosynthesized catalysts in the presence of NaBH4. The reaction rate of LrGO-Ag-Cu2O nanocomposite during 4-NP and MB reduction was found as 0.0026 s(-1) and 0.0497 s(-1), respectively. The LrGO-Ag-Cu2O nanocomposite showed superior catalytic performance for the reduction of both textile dyes.