One-step Hydrothermal Synthesis and Assembly of Copper and Silver Nanoparticles to Aggregates in Glyoxal Reduction System

A simple hydrothermal process has been developed for the synthesis and assembly of copper and silver nanoparticles to aggregates. The reduction of Cu2+ and Ag+ ions to the zerovalent metal was performed by glyoxal in the absence of any external agent. The produced glyoxylic acid (GA) in the redox pr...

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Bibliographic Details
Published in:Journal of the Chinese Chemical Society (Taipei) 2016-07, Vol.63 (7), p.627-635
Main Authors: Talar, Abbas Jorsaraei, Ghasemi, Hamideh, Rashidi, Alimorad, Khodabakhshi, Saeed
Format: Article
Language:English
Subjects:
Aggregates
Copper
Copper nanoparticles
Electron microscopes
Glyoxal
Hydrothermal
Scanning electron microscopy
Silver
Silver nanoparticles
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Summary:A simple hydrothermal process has been developed for the synthesis and assembly of copper and silver nanoparticles to aggregates. The reduction of Cu2+ and Ag+ ions to the zerovalent metal was performed by glyoxal in the absence of any external agent. The produced glyoxylic acid (GA) in the redox process stabi‐ lized metallic copper and silver particles and rendered them oxidation resistant for several months and dispersible in polar organic solvents and water. Detailed nanostructures of synthesized products were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD). The results demonstrated that assembly of nanoparticles to aggregates and their regularity were dependent on the reaction conditions such as temperature and concentration of the starting material. The Ostwald ripening process was proposed to explain the formation of copper nanoparticles by TEM observation at several times during the reaction. The existence of the surface stabilizing agent was identified by Fourier Transform infrared spectroscopy (FT‐IR) and thermogravimetric analyses (TGA). A simple hydrothermal process has been developed for the synthesis and assembly of copper and silver nanoparticles to aggregates. The reduction of Cu2+ and Ag+ ions to the zerovalent metal was performed by glyoxal in the absence of any external agent. The produced glyoxylic acid (GA) in the redox process stabilized metallic copper and silver particles and rendered them oxidation resistant for several months and dispersible in polar organic solvents and water.
ISSN:0009-4536
2192-6549
DOI:10.1002/jccs.201500455