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Physical science of materials
Localization and charge state of metal ions in carbon nanostructures of europium bis-phthalocyanine pyrolysed derivatives
V. S. Kozlova, V. G. Semenovab, A. A. Bykova, V. Yu. Bairamukova a The Petersburg Nuclear Physics Institute, The National Research Center "Kurchatov Institute", Gatchina, Russia
b Institute of Chemistry, St. Petersburg State University, 198504 Petergof, St. Petersburg, Russia
Abstract:
In the experiments of Mössbauer spectroscopy, transmission electron microscopy (TEM) and atomic force microscopy (AFM) the morphology and structurization of the carbon phase, the charge state of europium and the dynamic properties of europium bis-phthalocyanine pyrolysed derivatives, including the Debye temperature, were revealed. It was found that the pyrolysis of europium bis-pthalocyanine resulted in the amorphous carbon matrix and nanoscaled graphene clusters both forming turbostratic carbon phase. The europium ions in the charge state Eu$^{3+}$/Eu$^{2+}$ were detected. The data indicated that localization of Eu ions took place between layers of graphenes similar to graphite intercalation compounds. It was shown that an isomeric shift, linewidths and the magnitude of the resonant absorption are essential characteristics of structural transformations at the pyrolysis of rare earth bis-phthalocyanines.
Keywords:
pyrolysis, bis-pthalocyanine, carbon nanocomposite, graphene clusters, intercalation, Mössbauer spectroscopy.
Received: 20.12.2022 Revised: 16.03.2023 Accepted: 20.03.2023
Citation:
V. S. Kozlov, V. G. Semenov, A. A. Bykov, V. Yu. Bairamukov, “Localization and charge state of metal ions in carbon nanostructures of europium bis-phthalocyanine pyrolysed derivatives”, Zhurnal Tekhnicheskoi Fiziki, 93:6 (2023), 787–793
Linking options:
https://www.mathnet.ru/eng/jtf7008 https://www.mathnet.ru/eng/jtf/v93/i6/p787
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