Interaction of CuCl2 with poly(ethylene glycol) under microwave radiation

CuCl2 solutions various concentration in poly(ethylene glycol) (PEG) are treated with microwave (MW) radiation. Optical absorption and FT-IR spectra of the solutions before treatment and after treatment are discussed. It is proposed that before treatment Cu2+ ions have rhombic distorted octahedral c...

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Bibliographic Details
Published in:Materials research express 2017-01, Vol.4 (1)
Main Authors: Tverjanovich, A, Grevtsev, A, Bereznev, S
Format: Article
Language:English
Subjects:
Cu nanoparticles
microwave synthesis
with PEG
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Summary:CuCl2 solutions various concentration in poly(ethylene glycol) (PEG) are treated with microwave (MW) radiation. Optical absorption and FT-IR spectra of the solutions before treatment and after treatment are discussed. It is proposed that before treatment Cu2+ ions have rhombic distorted octahedral coordination in solution with four oxygen atoms of PEG and two Cl− ions. These oxygen atoms can be from hydroxyl or ether groups of PEG, depending on the relative ration OH− groups and Cu2+ ions. MW treatment of the solution results in a two-step reaction divided in time. The first stage of MW treatment leads to the reduction of Cu2+ ions to Cu+ ions. At the second stage Cu+ ions are reduced to Cu0 forming high-purity copper nanoparticles. In the same time PEG transforms with a formation of carbonyl groups. The shape of the obtained nanoparticles depends on the molecular weight of the used PEG.
ISSN:2053-1591
DOI:10.1088/2053-1591/aa52d0