DMAc used as a reducer for preparation of spherical silver nanoparticles with high dispersion

Abstract

A silver nanoparticle (AgNP) with good monodispersity was produced by a convenient method for reducing of AgNO 3 with N, N-dimethylacetamide in the presence of polyvinyl pyrrolidone (PVP) as the surface modification agent. The shape and size of the AgNP with reaction time were taken as variables. The surface plasmon band transition was monitored with reaction mixture time at different temperatures. The AgNP crystallinity increases with the reaction time, and the reduction efficiency is very low when AgNP solution is dealt at room temperature even after two days, while it is greatly improved at 160 °C only for 25 min. AgNP modified by the as-synthesized PVP has a face-centered cubic crystalline structure, in which AgNP could develop into a spherical morphology with a very narrow size distribution of 2−11 nm. The preparation provides a new reducing agent to form AgNP with simpler operation and shorter time.

Synthesis of Colloidal Metal Nanocrystals: A Comprehensive Review on the Reductants

“…In exploring the capability of amide‐based organic compounds as reductants, some studies have reported the use of N , N ‐dimethylacetamide (DMAc) in the synthesis of highly dispersed Ag spheroidal nanocrystals in a surfactant‐free system, in which DMAc served as a solvent, and a stabilizer, in addition to a reductant . However, in contrast to DMF, the exact mechanism involved in the oxidation of DMAc is yet to be explored.…”

“…Moreover, the reductant, depending on the physicochemical properties and experimental conditions, may directly affect the outcome of a synthesis due to its major impact on the reaction kinetics and thus the nucleation and growth of nanocrystals. To this end, many studies have recently started to systematically evaluate different types of reductants in an effort to elucidate the correlations between their properties and the final shape/morphology of the nanocrystals . Figure summaries a series of compounds that have been employed as reductants for the colloidal synthesis of metal nanocrystals through chemical reduction, differentiated by a large number of distinctive functional groups such as hydroxyl, carbonyl, and benzene, among others.…”

Preparation and Characterization of an Antibrowning Nanosized Ag-CeO2 Composite with Synergistic Antibacterial Ability

“…In order to improve the interface area and metal Materials 2023, 16, 5505 2 of 10 dispersion, much work had been completed recently [20,21]. The synergistic antibacterial activity of silver with cerium oxide composites was also discussed [20][21][22][23][24]. Li et al [20] reported that a Ag/CeO 2 nanocomposite prepared via selective laser welding in liquid had obvious composite interfaces.…”

Reductant‐Free Synthesis of Silver Nanoparticles by Functionalized Hollow Doughnut Mesoporous Silica Nanoparticles for Preparation of Catalytic Nanoreactor

“…Ag NPs can be reduced from Ag + by chemical reduction with several reducing agents such as sodium borohydride (NaBH 4 ), sodium citrate, N,N‐Dimethylformamide, N,N‐dimethylacetamide, aniline, ubiquitous natural organic matters . Among these reducing agents, NaBH 4 is widely used.…”