ABSTRACT
In this study CdS-Ag2S nanocomposites for antibacterial activity were synthesized via facile co-precipitation method using PVP as capping agent. The prepared nanocomposites have particle sizes in the range of 50-100â¯nm (SEM) and PVP addition has good influence on the morphology of nanocomposites. The antimicrobial activity of pure Ag2S, CdS and CdS-Ag2S composites was evaluated against Pseudomonas aeruginosa, Staphylococcus aureus and Escherichia coli. The results demonstrate that antibacterial activity was significantly improved due to increasing ratio of CdS into CdS-Ag2S nanocomposites in comparison to pure Ag2S and CdS.
Subject(s)
Anti-Bacterial Agents/administration & dosage , Cadmium Compounds/chemistry , Escherichia coli/growth & development , Nanocomposites/administration & dosage , Pseudomonas aeruginosa/growth & development , Silver Compounds/chemistry , Staphylococcus aureus/growth & development , Sulfides/chemistry , Anti-Bacterial Agents/chemistry , Escherichia coli/drug effects , Metal Nanoparticles/administration & dosage , Metal Nanoparticles/chemistry , Microbial Sensitivity Tests , Nanocomposites/chemistry , Pseudomonas aeruginosa/drug effects , Staphylococcus aureus/drug effectsABSTRACT
This project is focuses on novel, cost effective and simple plant mediated synthesis of silver nanoparticles (Ag-NPs) using leaf extract of Albizia procera. The optical, structural and physical properties of green synthesized Ag-NPs have been investigated by UV-Visible spectroscopy, X-ray Diffraction (XRD) and Atomic Force Microscopy (AFM), respectively. Prepared Ag-NPs are spherical in shape and crystalline in nature with an average size of 6.18â¯nm. Ag-NPs have showed promising potential in removal of organic pollutant methylene blue (MB) dye. Careful investigation on the removal of dye as a function of contact time, UV light and exposure time, dose of nanoparticles, temperature and pH have also been carried out. Moreover, Ag-NPs exhibit outstanding antibacterial activities against gram negative Escherichia coli (E. coli) and gram positive Staphylococcus aureus (S. aureus) bacterial pathogens.
Subject(s)
Albizzia/chemistry , Anti-Bacterial Agents/pharmacology , Coloring Agents/chemistry , Metal Nanoparticles/chemistry , Plant Extracts/pharmacology , Plant Leaves/chemistry , Silver/pharmacology , Dynamic Light Scattering , Escherichia coli/drug effects , Green Chemistry Technology , Hydrogen-Ion Concentration , Kinetics , Metal Nanoparticles/ultrastructure , Methylene Blue/chemistry , Microbial Sensitivity Tests , Microscopy, Atomic Force , Spectrophotometry, Ultraviolet , Staphylococcus aureus/drug effects , Temperature , Time Factors , X-Ray DiffractionABSTRACT
Development of reliable and eco-accommodating methods for the synthesis of nanoparticles is a vital step in the field of nanotechnology. Silver nanoparticles are important because of their exceptional chemical, physical, and biological properties, and hence applications. In the last decade, numerous efforts were made to develop green methods of synthesis to avoid the hazardous byproducts. This review describes the methods of green synthesis for Ag-NPs and their numerous applications. It also describes the comparison of efficient synthesis methods via green routes over physical and chemical methods, which provide strong evidence for the selection of suitable method for the synthesis of Ag-NPs.
