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Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation
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 CrO(3) in water. The effect of the concentration of dichromic acid on the change in texture characteristics, ele...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456443/ https://www.ncbi.nlm.nih.gov/pubmed/37623790 http://dx.doi.org/10.3390/membranes13080729 |
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author | Golovakhin, Valeriy Kim, Ekaterina Yu. Novgorodtseva, Oksana N. Maksimovskiy, Evgene A. Ukhina, Arina V. Ishchenko, Arcady V. Bannov, Alexander G. |
author_facet | Golovakhin, Valeriy Kim, Ekaterina Yu. Novgorodtseva, Oksana N. Maksimovskiy, Evgene A. Ukhina, Arina V. Ishchenko, Arcady V. Bannov, Alexander G. |
author_sort | Golovakhin, Valeriy |
collection | PubMed |
description | 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 CrO(3) 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 H(2)SO(4) 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 Cr(2)O(3) 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. |
format | Online Article Text |
id | pubmed-10456443 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-104564432023-08-26 Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation Golovakhin, Valeriy Kim, Ekaterina Yu. Novgorodtseva, Oksana N. Maksimovskiy, Evgene A. Ukhina, Arina V. Ishchenko, Arcady V. Bannov, Alexander G. Membranes (Basel) Article 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 CrO(3) 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 H(2)SO(4) 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 Cr(2)O(3) 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. MDPI 2023-08-12 /pmc/articles/PMC10456443/ /pubmed/37623790 http://dx.doi.org/10.3390/membranes13080729 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Golovakhin, Valeriy Kim, Ekaterina Yu. Novgorodtseva, Oksana N. Maksimovskiy, Evgene A. Ukhina, Arina V. Ishchenko, Arcady V. Bannov, Alexander G. Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation |
title | Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation |
title_full | Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation |
title_fullStr | Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation |
title_full_unstemmed | Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation |
title_short | Treatment of Multi-Walled Carbon Nanotubes with Dichromic Acid: Oxidation and Appearance of Intercalation |
title_sort | treatment of multi-walled carbon nanotubes with dichromic acid: oxidation and appearance of intercalation |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10456443/ https://www.ncbi.nlm.nih.gov/pubmed/37623790 http://dx.doi.org/10.3390/membranes13080729 |
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