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Zafer Çıplak,Bengü Getiren,Ceren Gökalp,Ceren Atila Dinçer,Atila Yıldız,Nuray Yıldız 한국화학공학회 2020 Korean Journal of Chemical Engineering Vol.37 No.12
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 photoelectron 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 27nm 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 s1 and 0.0497 s1, respectively. The LrGO-Ag-Cu2O nanocomposite showed superior catalytic performance for the reduction of both textile dyes.