Abstract
The synthesis of copper nanoparticles was studied by wet chemical methods using copper sulfate pentahydrate (CuSO4·5H2O) and nitrogen ligands allylamine (AAm) and polyallylamine (PAAm) as stabilizers. The results suggest that the use of these ligands leads to the exclusive formation of metallic copper nanoparticles (Cu‐NPs). The use of partially crosslinked polyallylamine (PAAmc) leads to nanoparticles (NPs) with low yields and high coating content, while linear PAAm leads to NPs with high yields and low coating content. The chemical composition of the particles was determined by XRD and average particle diameters were determined by the Debye‐Scherrer equation. TGA analysis provided evidence of the content and thermal stability of the coating on the nanoparticles and PAAm. The morphology, particle size distribution, and presence of PAAm coating were observed through TEM. The use of AAm in the synthesis of NPs could be a good alternative to reduce costs. By using TGA, TEM, and DSC techniques, it was determined that synthesized NPs with AAm presented a coating with similar characteristics to NPs with PAAm, suggesting that AAm underwent polymerization during the synthesis.
Highlights
Since 1990, scientific and technological research on the synthesis of inorganic nanoparticles has increased markedly due to their interesting physical properties and potential applications [1, 2]
Particles synthesized with a PAAm/Cu molar ratio of 0.11 and labeled as R3 are shown in the Transmission electron microscopy (TEM) micrograph of Figure 4
The average particle diameters determined by X-ray diffraction (XRD) were lower than 31 nm
Summary
Since 1990, scientific and technological research on the synthesis of inorganic nanoparticles has increased markedly due to their interesting physical properties and potential applications [1, 2]. The method of metal evaporation in gas phase has a high cost of starting materials and uses highly sophisticated equipment [6]; the synthetic route by pulsed laser ablation is not a simple process, as it is inflexible and relatively costly [20] Among these synthetic strategies, the wet chemical reduction is one of the most convenient methods because. Compounds which are frequently used to meet the above include surfactants tetraethylenepentamine [30], cetyltrimethylammonium bromide (CTAB) [31], tetraoctylammonium bromide [32], and polyelectrolytes such as polyethyleneimine (PEI) [33], polyethylene glycols (PEG) [34], polyvinylpyrrolidone (PVP) [35], polyetheretherketone (PEEK) [36], and polyallylamine (PAAm) [37] These materials can act as surface protectors, have the function of controlling size, size distribution, and shape of particles, and prevent agglomeration thereof. The synthesis was performed using different ratios of nitrogen ligands and using a constant concentration of NaOH and N2H4⋅H2O
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