GREEN SYNTHESIS, CHARACTERISTICS, ANTIMICROBIAL ACTIVITY AND ANTIOXIDANT OF NANO SILVER USING RED FLESH DRAGON FRUIT (HYLOCEREUS POLYRHIZUS) PEEL EXTRACT

Green nanosynthesis is increasingly attracting scientists to research and discover. In this study, we have successfully synthesized nano Silver from Red flesh Dragon fruit (Hylocereus polyrhizus) peel extract. The clean and safe nano synthesis can both solve the problem of organic waste in the processing industry, and can provide silver nanoparticles for different application purposes, especially in antibacterial, antifungal and medical. The nanoparticles have been morphologically and structurally characterized by modern physicochemical analysis methods:  Fourier Transform Infrared Spectroscopy (FT-IR), Dynamic Light Scattering (DLS), X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). The characteristics of Silver nanoparticles are shown on XRD spectrum with angle 2θ = 38.24o, 44.28o, 64.48o and 77.38o. The average nanoparticle size through TEM images was in the range of 20-100 nm. Moreover, silver nanoparticles have been evaluated for their antibacterial ability on Esherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, Bacillus subtilis, and antioxidant by ABTS method. The testing process shows that they have very good resistance to oxidation and bacteria. It holds promise for a potential antioxidant and antibacterial application.