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In this study hydrothermal synthesis of MnFe2O4 nanoparticles was carried out using andalas leaf extract (M. macroura Miq.) as capping agent. This study aims to determine the effect of pH on the shape and size of MnFe2O4 nanoparticles. MnFe2O4 EN10 and MnFe2O4 EN12 were synthesized using andalas leaf extract and NaOH with a pH of 10 and 12, respectively, while MnFe2O4 N10 and MnFe2O4 N12 were synthesized without using andalas leaf extract only by adding NaOH at pH 10 and 12. X-Ray Diffraction analysis results (XRD) shows the characteristics of MnFe2O4 cubic spinel with a crystal size of 11-16 nm, whereas MnFe2O4 E shows no formation of spinel ferrite MnFe2O4 which formed only impurities namely α-Fe2O3. The results of the characterization of Scanning Electron Microscopy (SEM) showed that the morphology of MnFe2O4 nanoparticles was spheric. MnFe2O4 nanoparticles were applied as antibacterial to the bacteria S. aureus and E. coli with the well method.

Ekstrak Daun Andalas sebagai Capping Agent dalam Green Hydrothermal Synthesis Nanopartikel Mangan Ferrit dan Aplikasinya sebagai Antibakteri