The Role of Aluminum in Graphitic Carbon Nitride Synthesis from Tiourea
https://doi.org/10.35596/1729-7648-2023-21-3-5-11
Abstract
The synthesis of a composite material based on graphitic carbon nitride by pyrolytic decomposition at 550 °C of a mechanical mixture of thiourea with the addition of aluminum powder in the amount of 5–30 wt.% has been studied. According to the scanning results by means of electron microscopy, energy dispersive X-ray spectroscopy, and X-ray diffractometry the synthesized material consists of carbon nitride, aluminum sulfide, residual metallic aluminum and aluminum hydroxide. The excess of metallic aluminum is due to the partial interaction with sulfur-containing volatile substances formed during the thermal decomposition of thiourea. It is shown that the intensity and width of the photoluminescence spectra of the synthesized composites are determined by the aluminum concentration in the initial mixture. As the aluminum concentration increases from 5 to 30 wt.%, the photoluminescence intensity maximum shifts to the long wavelength region from 534 to 560 nm. This can be used to create optoelectronic devices based on the graphitic carbon nitride.
Keywords
graphitic carbon nitride,
aluminum,
aluminum sulfide,
scanning electron microscopy,
X-ray diffractometry,
photoluminescence
Supporting agencies: The work is supported by the SPSI “Materials science, new materials and technologies”, project 1.4, SPSI “Convergence”, project 3.03.4, and grant F22-114 of the Belarusian Republican Foundation for Fundamental Research. We are grateful to D. V. Zhygulin for analysis of the samples with scanning electron microscopy.
About the Authors
S. E. Maksimov
Belarusian State University of Informatics and Radioelectronics
Belarus
Belarus
Maksimov Sergey Evgenyevich, Student
220013, Minsk, P. Brovki St., 6
Tel.: +375 17 293-88-69
E. B. Chubenko
Belarusian State University of Informatics and Radioelectronics
Belarus
Belarus
Cand. of Sci., Associate Professor, Leading Researcher at the Research Laboratory of Materials and Structures of Nanoelectronics of R&D Department
Minsk
V. E. Borisenko
Belarusian State University of Informatics and Radioelectronics
Belarus
Belarus
Dr. of Sci. (Phys. and Math.), Professor, Professor at the Micro- and Nanoelectronics Department
Minsk
A. I. Kulak
Institute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus
Belarus
Belarus
Academician, Dr. of Sci. (Chem.), Professor, Director
Minsk
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Review
For citations:
Maksimov S.E., Chubenko E.B., Borisenko V.E., Kulak A.I. The Role of Aluminum in Graphitic Carbon Nitride Synthesis from Tiourea. Doklady BGUIR. 2023;21(3):5-11. (In Russ.) https://doi.org/10.35596/1729-7648-2023-21-3-5-11
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