Calorimetric, NEXAFS and XPS Studies of MWCNTs with Low Defectiveness | Sciact - CRIS-system of Boreskov Institute of Catalysis

Calorimetric, NEXAFS and XPS Studies of MWCNTs with Low Defectiveness Full article

Journal

Fullerenes Nanotubes and Carbon Nanostructures
ISSN: 1536-383X , E-ISSN: 1536-4046

Output data

Year: 2021, Volume: 29, Number: 5, Pages: 331-336 Pages count : 6 DOI: 10.1080/1536383x.2020.1819251

Tags

Carbon nanotubes; MWCNTs; specific heat; DSC; low-dimensional systems

Authors

Barabashko M.S. ¹ , Drozd M. ² , Szewczyk D. ² , Jeżowski A. ² , Bagatskii M.I. ¹ , Sumarokov V.V. ¹ , Dolbin A.V. ¹ , Nesov S.N. ³ , Korusenko P.M. ⁴ , Ponomarev A.N. ⁵ , Geidarov V.G. ¹ , Kuznetsov V.L. ^6,7 , Moseenkov S.I. ⁶ , Sokolov D.V. ⁸ , Smirnov D.A. ⁹

Affiliations

1	B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine
2	W. Trzebiatowski Institute of Low Temperature and Structure Research, Polish Academy of Sciences
3	Omsk State Technical University
4	St. Petersburg State University
5	Institute of Strength Physics and Materials Science of SB RAS
6	Boreskov Institute of Catalysis
7	National Research Tomsk State University
8	Omsk Scientific Center of SB RAS
9	Institute of Solid State Physics, Dresden University of Technology

Funding (6)

1	Helmholtz-Centre Berlin for Materials and Energy BESSY	HZB RP 19208770
2	National Academy of Sciences of Ukraine	0119U102391
3	W. Trzebiatowski Institute of Low Temperatures and Structure Research
4	Ministry of Science and Higher Education of the Russian Federation	III.23
5	Ministry of Science and Higher Education of the Russian Federation	ГЗ-2017-2020
6	Saint Petersburg State University	46372830

DSC and calorimetric studies of multi-walled carbon nanotubes (MWCNTs) with average diameters in the range 7, 9 and 18 nm were carried out. MWCNTs were obtained by the CVD method. The kinetic processes in MWCNTs were studied from room temperature to 550 oC in a nitrogen flow using differential scanning calorimetry (DSC) on a Perkin – Elmer — 8000. It was found that exo and endothermic peaks are not observed on the DSC curves after water evaporation. This indicates that all studied MWCNTs have a small number of defects, functional groups, and other impurities. The heat capacity of MWCNTs was measured by the relaxation method in the temperature range from 2 to 275 K by using PPMS. In the temperature dependences of the specific heat were observed that for MWCNTs with the decrease of the temperature below 20 K the curves shift to lower values with an increase the average diameter. The main result was that at temperatures below 45 K with the decreasing of the nanotubes diameter the ratio of heat capacity of nanotubes to the heat capacity of graphite increases. The perfection of structure and low amount of the defects, functional groups and impurity contamination for MWCNTs were demonstrated in the comparison of the XPS and NEXAFS spectra for these nanotubes with CVD prepared nanotubes (18 nm) after mechanical and chemical functionalization.

Barabashko M.S. , Drozd M. , Szewczyk D. , Jeżowski A. , Bagatskii M.I. , Sumarokov V.V. , Dolbin A.V. , Nesov S.N. , Korusenko P.M. , Ponomarev A.N. , Geidarov V.G. , Kuznetsov V.L. , Moseenkov S.I. , Sokolov D.V. , Smirnov D.A.
Calorimetric, NEXAFS and XPS Studies of MWCNTs with Low Defectiveness
Fullerenes Nanotubes and Carbon Nanostructures. 2021. V.29. N5. P.331-336. DOI: 10.1080/1536383x.2020.1819251 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Aug 17, 2020
Accepted:	Sep 1, 2020
Published online:	Sep 11, 2020
Published print:	May 4, 2021

Web of science:	WOS:000568943100001
Scopus:	2-s2.0-85090951892
Elibrary:	45356734
Chemical Abstracts:	2020:1839750
OpenAlex:	W3085858941

DB	Citing
Scopus	13
Web of science	11
Elibrary	9
OpenAlex	10