Antibacterial activities of Hibiscus cannabinus stem-assisted silver and gold nanoparticles

Abstract The synthesis of silver (Ag) and gold (Au) nanoparticles (NPs) using Hibiscus cannabinus stem extract was studied. The synthesized NPs were characterized using UV–visible spectroscopy (UV–vis), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Energy Dispersive X-ray analysis (EDX). The surface plasmon resonance (SPR) peak of synthesized NPs was observed at 444 nm and 547 nm corresponding to AgNPs and AuNPs respectively. The prepared AgNPs and AuNPs were almost spherical in shape with the average particle size of 10 nm and 13 nm respectively. The FTIR study reveals that the carboxylic acid present in H. cannabinus stem extract has been used as reducing agent. The observed antibacterial properties, suggest the possible utilization of prepared NPs in water purification.