Energy state of the electronic subsystem of porous carbon material caused by laser irradiation

I.M. Budzulyak; L.S. Yablon; M.M. Khemii; V.O. Kotsyubynsky; B.І. Rachiy; V.М. Boychuk; І.І. Budzulyak

doi:10.15330/pcss.24.4.662-669

Authors

I.M. Budzulyak Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
L.S. Yablon Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
M.M. Khemii Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
V.O. Kotsyubynsky Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
B.І. Rachiy Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
V.М. Boychuk Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine
І.І. Budzulyak Vasyl Stefanyk Precarpathian National University, Ivano-Frankivsk, Ukraine

DOI:

https://doi.org/10.15330/pcss.24.4.662-669

Keywords:

electron paramagnetic resonance, porous carbon material, porometry, Mössbauer spectroscopy

Abstract

The changes in the electronic subsystem of a porous carbon material caused by its doping with Mn, Cr, and Fe and laser irradiation were studied by the method of electron paramagnetic resonance. It has been found that Mn doping leads to the appearance of several paramagnetic centers, and laser irradiation facilitates the redistribution of electrons between different states so that their mobility increases due to the transition from the g = 3.9 to the g = 6.0 state. The Mössbauer spectroscopy of porous Fe-doped carbon material indicates the presence of oxygen ligands for iron ions, in particular the formation of octa- and tetra-complexes with redistribution of electron density between iron and oxygen nuclei, and, accordingly, changes in the degree of covalence of the chemical bond from Fe³⁺ to Fe²⁺.

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