One step biosynthetic mechanism of hybrid reduced graphene oxide/Mn nanoparticles used for simultaneous removal antibiotics

Recently, green synthetic technology has attracted much attention due to its low cost, waste-reuse and environmental friendliness. In this study, reduced graphene oxide/manganese nanoparticles hybrids (rGO/Mn NPs) were successfully synthesized utilizing green tea extract by one-step method. The rGO/Mn NPs were characterized by SEM-EDS, XRD , Raman, FTIR and BET, and the results indicate oxygen-containing functional groups in GO were effectively removed. Also, manganese nanoparticles (Mn NPs) were uniformly decorated on the rGO surface, and rGO/Mn NPs hybrids exhibited a lamellar sandwich structure, which was improve the specific surface area and provide more adsorption sites. The biomolecules in tea extract were further identified by GC–MS analysis, where showed that 1,2,3-trichlorophenol, caffeine and antioxidant were involved to the biosynthesis. Furthermore, the rGO/Mn NPs were used to simultaneously remove oxytetracycline/tetracycline (OTC/TC) with more than 90% of the removal efficiency, demonstrating that rGO/Mn NPs have a potential for treating antibiotic wastewater.