Biological synthesis of bimetallic hybrid nanocomposite: A remarkable photocatalyst, adsorption/desorption and antimicrobial agent

Abstract

Herein bimetallic nanocomposites Ag with nickel and cobalt were synthesized by using the extract of W. coagulans. Nanocomposites synthesis were confirmed by using UV-Visible at 430 nm for and 504 nm for Ag@Ni and Ag@Co respectively. From XRD technique it was established that nanocomposites have crystalline nature and face-centered cubic structure. A strong antibacterial behavior toward Gram-positive Bacteria Staphylococcus aureus with 48.9% and 32.1% inhibition for Ag@Co and Gram-negative bacteria E. coli with 33.1% and 25.7% inhibition zone were observed for Ag@Ni respectively. Next the composites exhibited electrifying 90.2% and 82% degradation for Ag@Co and Ag@Ni against methyl orange (MO) through photocatalysis. Furthermore, Ag@Ni and Ag@Co nanocomposites showed efficient adsorption capacity of heavy metal (lead) at pH 7 within 45 min and 90% for adsorptive removal of lead ions from water with significant antioxidant potential. The current finding suggested, silver-based nanocomposites as an appropriate and promising candidate for efficient adsorptive and catalytic potentials removal of toxic pollutants.

Keywords

• Green synthesis
• Bimetals composite
• Adsorption capacity
• Photocatalytic activity