Synthesis of Chlorine- and Nitrogen-Containing Carbon Nanofibers for Water Purification from Chloroaromatic Compounds Full article
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Materials
ISSN: 1996-1944 |
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| Output data | Year: 2022, Volume: 15, Number: 23, Article number : 8414, Pages count : 19 DOI: 10.3390/ma15238414 | ||||||
| Tags | chloroaromatics; adsorption; hydrodechlorination; N-containing carbon nanofibers; trichloroethylene; nickel catalyst | ||||||
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 22-13-00406 |
Abstract:
Chlorine- and nitrogen-containing carbon nanofibers (CNFs) were obtained by combined catalytic pyrolysis of trichloroethylene (C2HCl3) and acetonitrile (CH3CN). Their efficiency in the adsorption of 1,2-dichlorobenzene (1,2-DCB) from water has been studied. The synthesis of CNFs was carried out over self-dispersing nickel catalyst at 600 °C. The produced CNFs possess a well-defined segmented structure, high specific surface area (~300 m2/g) and high porosity (0.5–0.7 cm3/g). The addition of CH3CN into the reaction mixture allows the introduction of nitrogen into the CNF structure and increases the volume of mesopores. As a result, the capacity of CNF towards adsorption of 1,2-DCB from its aqueous solution increased from 0.41 to 0.57 cm3/g. Regardless of the presence of N, the CNF samples exhibited a degree of 1,2-DCB adsorption from water–organic emulsion exceeding 90%. The adsorption process was shown to be well described by the Dubinin–Astakhov equation. The regeneration of the used CNF adsorbent through liquid-phase hydrodechlorination was also investigated. For this purpose, Pd nanoparticles (1.5 wt%) were deposited on the CNF surface to form the adsorbent with catalytic function. The presence of palladium was found to have a slight effect on the adsorption capacity of CNF. Further regeneration of the adsorbent-catalyst via hydrodechlorination of adsorbed 1,2-DCB was completed within 1 h with 100% conversion. The repeated use of regenerated adsorbent-catalysts for purification of solutions after the first cycle of adsorption ensures almost complete removal of 1,2-DCB.
Cite:
Ozerova A.M.
, Potylitsyna A.R.
, Bauman Y.I.
, Tayban E.S.
, Lipatnikova I.L.
, Nartova A.V.
, Vedyagin A.A.
, Mishakov I.V.
, Shubin Y.V.
, Netskina O.V.
Synthesis of Chlorine- and Nitrogen-Containing Carbon Nanofibers for Water Purification from Chloroaromatic Compounds
Materials. 2022. V.15. N23. 8414 :1-19. DOI: 10.3390/ma15238414 WOS Scopus РИНЦ AN PMID OpenAlex
Synthesis of Chlorine- and Nitrogen-Containing Carbon Nanofibers for Water Purification from Chloroaromatic Compounds
Materials. 2022. V.15. N23. 8414 :1-19. DOI: 10.3390/ma15238414 WOS Scopus РИНЦ AN PMID OpenAlex
Dates:
| Submitted: | Nov 7, 2022 |
| Accepted: | Nov 22, 2022 |
| Published online: | Nov 25, 2022 |
| Published print: | Dec 1, 2022 |
Identifiers:
| Web of science: | WOS:000897310000001 |
| Scopus: | 2-s2.0-85143765442 |
| Elibrary: | 50398772 |
| Chemical Abstracts: | 2022:3091790 |
| PMID: | 36499909 |
| OpenAlex: | W4310057052 |