Preparation and Study of Polyacryamide-Stabilized Silver Nanoparticles through a One-Pot Process

Abstract

A one-pot route was illustrated to synthesize stable well-dispersed silver colloids stabilized by polyacrylamide on a large scale. Reduction of silver ions and polymerization of acrylamide occurred almost simultaneously in the absence of a commonly used reducing agent and initiator. A possible mechanism for the formation of silver nanoparticles with bimodal size distribution was proposed. The structure and composition of the obtained nanoparticles were characterized carefully. Furthermore, light scattering simulation and UV-vis absorption studies confirmed that the obtained colloids were the mixture of Ag and Ag2O nanoparticles. The presence of silver oxide layers on the nanoparticle surface should be responsible for the broadening of the surface plasmon band of silver nanoparticles. Ag2O layers could be added or removed from Ag nanoparticle surfaces by the addition of HNO3, HAc, or NaCl solution to the as-obtained silver colloids.

Antimicrobial, free radical scavenging activities and catalytic oxidation of benzyl alcohol by nano-silver synthesized from the leaf extract of Aristolochia indica L.: a promenade towards sustainability

“…Among the synthetic methods used for the preparation of silver nanoparticles, some toxic chemicals such as NaBH 4 , citrate, or ascorbate are most commonly used as a reducing agent (Chen et al 2006;Kuo and Chen 2003). Considering that such reducing agents may be associated with environmental toxicity or biological hazards, the development of green synthesis for silver nanoparticles is desired (Elumalai et al 2010).…”

Linseed hydrogel-mediated green synthesis of silver nanoparticles for antimicrobial and wound-dressing applications

“…The more commonly used methods include chemical and photochemical reduction, 17,18 electrochemical method, 19 and laser ablation. 20,21 Use of chemical reduction method for synthesis of Ag NPs involves environmentally hostile reducing agents, 22,23 toxic solvents, 24 and nonbiodegradable/synthetic…”

Toxicity and antibacterial assessment of chitosan-coated silver nanoparticles on human pathogens and macrophage cells

“…[13][14][15][16] Among the synthetic methods, a chemical reduction of silver salt solution using reducing agents such as sodium dodecyl sulfate, citrate, ascorbate, hyperbranched polyester, N,N-dimethylformamide, and sodium borohydride is most commonly used. [16][17][18] Most of these reducing agents lead to environmental toxicity or biological hazards; therefore, the trend has shifted to biological synthesis of AgNPs using polymer matrices, as they have no toxicity risks and they can be easily designed into almost any shape required for a particular application. This includes the use of different biopolymers such as starch, 19 chitosan, 6 cyclodextrins, 20 and bacterial biomass 21 that act as both a stabilizing and a reducing agent.…”