Synthesis and surface chemistry of nano silver particles

• Published in: Polyhedron Vol. 28; no. 12; pp. 2522 - 2530
• Main Authors: Janardhanan, Revathi, Karuppaiah, Murugan, Hebalkar, Neha, Rao, Tata Narsinga
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 05.08.2009
• Subjects: Chemical synthesis; Diethyl amine; Gluconic acid; Nano silver; Gluconic acid; Nano silver; Chemical synthesis; Diethyl amine
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2009.05.038

Silver nano particles of the size 40–80 nm are formed in the process of oxidation of glucose to gluconic acid by amine in the presence of silver nitrate, and the gluconic acid caps the nano silver particle. The presence of gluconic acid on the surface of nano silver particles was confirmed by XPS and FTIR studies. As the nano silver particle is encapsulated by gluconic acid, there was no surface oxidation, as confirmed by XPS studies. The nano silver particles have also been studied for their formation, structure, morphology and size using UV–Visible spectroscopy, XRD and SEM. Further, the antibacterial properties of these nano particles show promising results for E. coli. The influence of the alkaline medium towards the particle size and yield was also studied by measuring the pH during the course of the reaction for various bases including DEA, NaOH and Na 2CO 3. In this report, we present a simple wet chemical route to synthesize nano-sized silver particles, and their surface properties are discussed in detail. Silver nano particles of the size 40–80 nm are formed in the process of oxidation of glucose to gluconic acid by amine in the presence of silver nitrate, and the gluconic acid caps the nano silver particle. The presence of gluconic acid on the surface of nano silver particles was confirmed by XPS and FTIR studies. As the nano silver particle is encapsulated by gluconic acid, there was no surface oxidation, as confirmed by XPS studies. The nano silver particles have also been studied for their formation, structure, morphology and size using UV–Visible spectroscopy, XRD and SEM. Further, the antibacterial properties of these nano particles show promising results for E. Coli. The influence of the alkaline medium towards the particle size and yield was also studied by measuring the pH of the reaction for DEA, NaOH and Na 2CO 3.