Features of obtaining the catalyst for the synthesis of carbon nanotubes
https://doi.org/10.20914/2310-1202-2019-2-261-267
Abstract
In this paper, the features of obtaining a Co-Mo/Al2O3 catalyst to synthesize carbon nanotubes (CNTs) by thermal decomposition were studied. It was revealed that the duration of the pre-catalyst thermal decomposition stage in the process of developing a metal oxide system has a significant impact on its activity in the synthesis of carbon nanostructured materials by chemical vapor deposition (CVD). It was proved that an effective catalyst for CNTs synthesis can be obtained by through thermal decomposition of the pre – catalyst, without calcination of the metal oxide system. The use of the Co-Mo/Al2O3 catalyst, synthesized in such a way, in the CVD process makes it possible to reduce the cost of synthesized CNTs. Using scanning electron microscopy, it was shown that the size of the grains, and specific surface area of the formed Co-Mo/Al2O3 catalyst depend on the thermal treatment conditions of the pre-catalyst. Under the conditions for the implementation of the pre-catalyst thermal decomposition stage (temperature, volume, duration, etc.), it is possible to contro not only the characteristics of the resulting catalyst (specific surface area, efficiency), but also the characteristics of the CNTs (diameter, degree of defectiveness). In the course of experiments, the optimal modes of implementation of the method for obtaining the Co-Mo/Al2O3 catalyst allowed forming a system with a specific surface area of ~ 108 m2/g. The use of the resulting catalyst in the synthesis of nanostructured materials provides a high specific yield of multi-walled CNTs with a diameter of 8-20 nm and a degree of defectiveness of 0.97.
About the Authors
E. A. Burakova
Tambov State Technical University
Russian Federation
Cand. Sci. (Engin.), associate professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
Russian Federation
Cand. Sci. (Engin.), associate professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
G. S. Besperstova
Tambov State Technical University
postgraduate, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
postgraduate, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
M. A. Neverova
Tambov State Technical University
master student, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
master student, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
A. G. Tkachev
Tambov State Technical University
Dr. Sci. (Engin.), professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
Dr. Sci. (Engin.), professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
N. V. Orlova
Tambov State Technical University
Cand. Sci. (Engin.), associate professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
Cand. Sci. (Engin.), associate professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
T. P. Dyachkova
Tambov State Technical University
Dr. Sci. (Chem.), professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
Dr. Sci. (Chem.), professor, technique and technology of production of nanoproducts department, 106, Sovetskaya Str., Tambov, Russia
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Review
For citations:
Burakova E.A., Besperstova G.S., Neverova M.A., Tkachev A.G., Orlova N.V., Dyachkova T.P. Features of obtaining the catalyst for the synthesis of carbon nanotubes. Proceedings of the Voronezh State University of Engineering Technologies. 2019;81(2):261-267. (In Russ.) https://doi.org/10.20914/2310-1202-2019-2-261-267
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