Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation | Sciact - CRIS-system of Boreskov Institute of Catalysis

Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation Full article

Journal

Membranes
ISSN: 2077-0375

Output data

Year: 2023, Volume: 13, Number: 8, Article number : 729, Pages count : 18 DOI: 10.3390/membranes13080729

Tags

carbon nanotubes; functionalization; chemical functionalization; dichromic acid; carbon nanomaterials; MWCNTs; treatment; intercalation; chromium oxide

Authors

Golovakhin Valeriy ¹ , Kim Ekaterina Yu. ¹ , Novgorodtseva Oksana N. ^1,2 , Maksimovskiy Evgene A. ³ , Ukhina Arina V. ² , Ishchenko Arcady V. ⁴ , Bannov Alexander G. ¹

Affiliations

1	Department of Chemistry and Chemical Engineering, Novosibirsk State Technical University, 630073 Novosibirsk, Russia
2	Institute of Solid State Chemistry and Mechanochemistry, Siberian Branch of Russian Academy of Sciences, 630092 Novosibirsk, Russia
3	Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia
4	Boreskov Institute of Catalysis, Siberian Branch of Russian Academy of Sciences, 630090 Novosibirsk, Russia

Funding (1)

Ministry of Science and Higher Education of the Russian Federation

FSUN-2023-0008

This work is dedicated to the study of the treatment of multi-walled carbon nanotubes (MWCNTs) with dichromic acid. The dichromic acid was formed by dissolving different concentrations of CrO3 in water. The effect of the concentration of dichromic acid on the change in texture characteristics, elemental composition, defectiveness, graphitization degree, and surface chemistry of MWCNTs was investigated using various analytical techniques, such as transmission electron microscopy, energy-dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction, and X-ray photoelectron spectroscopy (XPS). Testing of MWCNTs as electrodes for supercapacitors in 3.5 M H2SO4 solution was carried out using cyclic voltammetry. A decrease in the average diameter of CNTs after treatment was found. The EDX and XPS showed that the oxygen content on the surface of MWCNTs increased after treatment with dichromic acid. The formation of Cr2O3 after treatment with dichromic acid was detected by XPS. High angle annular dark field scanning transmission electron microscopy was used to confirm the intercalation of the chromium-containing compound between graphene layers of MWCNTs after treatment with dichromic acid. It was found that two different types of MWCNTs showed diverse behavior after treatment. The highest specific capacitance of the MWCNTs after treatment was 141 F g−1 (at 2 mV s−1) compared to 0.3 F g−1 for the untreated sample.

Golovakhin V. , Kim E.Y. , Novgorodtseva O.N. , Maksimovskiy E.A. , Ukhina A.V. , Ishchenko A.V. , Bannov A.G.
Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation
Membranes. 2023. V.13. N8. 729 :1-18. DOI: 10.3390/membranes13080729 WOS Scopus РИНЦ AN PMID OpenAlex

Submitted:	May 31, 2023
Accepted:	Aug 10, 2023
Published print:	Aug 12, 2023
Published online:	Aug 12, 2023

Web of science:	WOS:001057023400001
Scopus:	2-s2.0-85169054113
Elibrary:	54948921
Chemical Abstracts:	2023:1809901
PMID:	37623790
OpenAlex:	W4385812856

DB	Citing
OpenAlex	4
Scopus	4
Web of science	2
Elibrary	3