CHARACTERIZATION, ANTIOXIDANT AND ANTIMICROBIAL ACTIVITY OF SILVER NANOPARTICLES SYNTHESIZED WITH THE GUAVA FRUIT EXTRACT

Saranya  Chommantree; Poonyaphat  Sangjun; Jitlada  Chumee; Saowanee  Kumpun; Sirilak  Namwong; Ploysai  Ohama

Saranya Chommantree Suan Sunandha Rajabhat University
Poonyaphat Sangjun Suan Sunandha Rajabhat University
Jitlada Chumee Suan Sunandha Rajabhat University
Saowanee Kumpun Suan Sunandha Rajabhat University
Sirilak Namwong Suan Sunandha Rajabhat University
Ploysai Ohama Suan Sunandha Rajabhat University

Keywords: Silver nanoparticles, Antioxidant, Antibacterial, Guava

Abstract

Silver nanoparticles (AgNPs) can be synthesized using biomolecules derived from
different plant components and microbial species. In this case, silver nanoparticles that have
been produced can be made physiologically active by using plant extracts that contain bioactive
cmpounds like polyphenols, flavonoids, or tannins. In this study, biocompatible silver
nanoparticles were synthesized from aqueous extract of guava (Psidium guajava Linn.) fruit.
The formation of nanoparticles (AgNPs-Gv) was confirmed by the color change and by UV-
vis spectrometry. The structural and morphological properties of AgNPs-Gv were confirmed
by Transmission electron microscope (TEM) and Energy Dispersive X-ray Spectrometer
(EDX) analysis and exhibited that particles were spherical in shape with size smaller than 50
nm. The antioxidant activity of AgNPs-Gv was investigated by DPPH method. The
antibacterial activity of the synthesized AgNPs-Gv against Gram-negative E. coli and Gram-
positive S. aureus was also examined. The result showed that the synthesized biocompatible
silver nanoparticles had high antioxidant and antibacterial propertie