Effect of Pretreatment with Acids on the N-Functionalization of Carbon Nanofibers Using Melamine Full article
| Journal |
Materials
ISSN: 1996-1944 |
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| Output data | Year: 2022, Volume: 15, Number: 22, Article number : 8239, Pages count : 20 DOI: 10.3390/ma15228239 | ||||
| Tags | CCVD; Ni–Cu catalyst; carbon nanofibers; oxidative treatment; N-functionalization; melamine | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0010 |
Abstract:
Nowadays, N-functionalized carbon nanomaterials attract a growing interest. The use of melamine as a functionalizing agent looks prospective from environmental and cost points of view. Moreover, the melamine molecule contains a high amount of nitrogen with an atomic ratio C/N of 1/2. In present work, the initial carbon nanofibers (CNFs) were synthesized via catalytic pyrolysis of ethylene over microdispersed Ni–Cu alloy. The CNF materials were pretreated with 12% hydrochloric acid or with a mixture of concentrated nitric and sulfuric acids, which allowed etching of the metals from the fibers and oxidizing of the fibers’ surface. Finally, the CNFs were N-functionalized via their impregnation with a melamine solution and thermolysis in an inert atmosphere. According to the microscopic data, the initial structure of the CNFs remained the same after the pretreatment and post-functionalization procedures. At the same time, the surface of the N-functionalized CNFs became more defective. The textural properties of the materials were also affected. In the case of the oxidative treatment with a mixture of acids, the highest content of the surface oxygen of 11.8% was registered by X-ray photoelectron spectroscopy. The amount of nitrogen introduced during the post-functionalization of CNFs with melamine increased from 1.4 to 4.3%. Along with this, the surface oxygen concentration diminished to 6.4%.
Cite:
Maksimova T.A.
, Mishakov I.V.
, Bauman Y.I.
, Ayupov A.B.
, Mel’gunov M.S.
, Dmitrachkov A.M.
, Nartova A.V.
, Stoyanovskii V.O.
, Vedyagin A.A.
Effect of Pretreatment with Acids on the N-Functionalization of Carbon Nanofibers Using Melamine
Materials. 2022. V.15. N22. 8239 :1-20. DOI: 10.3390/ma15228239 WOS Scopus РИНЦ AN PMID OpenAlex
Effect of Pretreatment with Acids on the N-Functionalization of Carbon Nanofibers Using Melamine
Materials. 2022. V.15. N22. 8239 :1-20. DOI: 10.3390/ma15228239 WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Oct 1, 2022 |
| Accepted: | Nov 17, 2022 |
| Published print: | Nov 20, 2022 |
| Published online: | Nov 20, 2022 |
Identifiers:
| Web of science: | WOS:000887563200001 |
| Scopus: | 2-s2.0-85142711747 |
| Elibrary: | 50398777 |
| Chemical Abstracts: | 2022:2971031 |
| PMID: | 36431724 |
| OpenAlex: | W4309788043 |