Insights into the catalytic reduction of organic dyes and antibacterial activity of graphene oxide supported mono and bimetallic nanocomposites. (8th May 2017)

• Record Type: Journal Article
• Authors: Sivaranjan, K.; Vanitha, P.; Sathiyaseelan, A.; Kalaichelvan, P. T.; Sathuvan, M.; Rengasamy, R.; Santhanalakshmi, J.
• Is Part Of: New journal of chemistry. Volume 41:Number 11(2017)
• Page Start: 4348
• Page End: 4359
• Publication Date: 2017-05-08
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj03467e
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : GO-supported mono and bimetallic NCs were synthesized. The newly designed GO-supported NCs were utilized for the catalytic reduction of organic dyes and their antibacterial activity was also investigated. Abstract : Graphene oxide (GO) supported mono (GO/Ru, GO/Ag and GO/Pd) and bimetallic (GO/Ru–Ag and GO/Ru–Pd) nanocomposites (NCs) were prepared via a simple chemical reduction method. The newly designed GO-supported mono and bimetallic NCs were characterized using various techniques, such as Fourier transform-infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX) and high resolution transmission electron microscopy (HR-TEM). Furthermore, the GO-supported mono and bimetallic NCs were utilized for the reduction of two organic dyes, crystal violet (CV) and malachite green (MG), using NaBH4 in an aqueous medium at 25 °C. The catalytic reaction followed pseudo-first-order reaction kinetics, as monitored using UV-visible spectroscopy. In addition to this, the antibacterial activity of these prepared mono and bimetallic NCs was studied against two Gram (+ve), Staphylococcus aureus ( S. aureus ) and Bacillus subtilis ( B. subtilis ), and two Gram (−ve) bacteria, Salmonella typhi ( S. typhi ) and Escherichia coli ( E. coli ). The bimetallic NCs exhibited excellent catalytic and antibacterial activity as compared to the monometallic NCs.