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Formation of Copper Nanoparticles in Oxide Glasses

Authors: Schwarz Jiří | Knotek Petr | Yatskiv Roman | Kostka Petr | Kutálek Petr | Smolík Jan

Year: 2025

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Formation of Copper Nanoparticles in Oxide Glasses	This contribution focuses on the preparation of Cu nanoparticles in microscopic glass and lead phosphate glass. Cu nanoparticles were prepared on microscope glass by ion exchange in eutectic melt, containing 54 mol. % of CuSO4 and 46 mol. % of Na2SO4, at 590 °C. After ion exchange, the individual glasses contained Cu2+ ions, which were subsequently reduced to Cu nanoparticles by H2 tempering. Characterization was performed using UV-Vis spectra, which revealed a surface plasmon band at λ = 570 nm was found. The possibility of preparing Cu nanoparticles in lead phosphate glasses by UV-induced disproportionation of monovalent copper ions to form atomic and divalent copper was also investigated. Specifically, glasses of the system 55PbO - 10ZnO - 35P2O5 doped with 0.25 mol. % CuO and SnO were synthesized. The effect of synthesis time on the resulting physical properties, including the presence of monovalent copper ions, was studied for the prepared glasses. Samples of these glasses were subsequently exposed to UV light to prepare Cu nanoparticles. The presence of monovalent copper ions and the subsequent formation of Cu nanoparticles were confirmed for the glasses with short synthesis times by UV-VIS spectroscopy.	metallic nanoparticles, ion exchange, oxide glass, UV exposure