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Fluorine and Bromine Dual-Doped Nanoporous Carbons: Preparation and Surface Chemistry Studies

Mussabek, Gauhar; Baktygerey, Saule; Taurbayev, Yerzhan; Yermukhamed, Dana; Zhylkybayeva, Nazym; Diyuk, Vitaliy E.; Zaderko, Alexander; Afonin, Sergii 1; Mariychuk, Ruslan; Kaňuchová, Mária; Lisnyak, Vladyslav V.
1 Institut für Biologische Grenzflächen (IBG), Karlsruher Institut für Technologie (KIT)

Abstract:

A novel method for the concurrent introduction of fluorine and bromine into the surface of nanoporous activated carbon (NAC) is evaluated. According to the method, the preheated NAC was treated with 1,2-dibromotetrafluoroethane at elevated temperatures (400−800 °C). Potentiometric and elemental analysis, nitrogen adsorption−desorption, scanning electron microscopy-energy-dispersive X-ray spectroscopy, X-ray photoelectron spectros-
copy (XPS), and 19F solid-state NMR were used to study the NAC microstructure and changes in surface chemistry. The specific modification temperature was found to have a decisive influence on the resulting halogen content of the NAC surface. About 1.5 mmol g1 of bromine and only 0.5 mmol g1 of fluorine are chemisorbed on the NAC surface when dual-doped at 400 °C. The fluorination efficiency increases dramatically to 1.84−2.22 mmol g1 when the process temperature is increased to 500−700 °C.
Under the same conditions, the bromination efficiency unexpectedly decreases to 0.66−1.32 mmol g1. Since halogen-containing groups undergo significant thermal decomposition around 800 °C, the overall halogenation efficiency decreases, accordingly. ... mehr

Zugehörige Institution(en) am KIT Institut für Biologische Grenzflächen (IBG)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 17.09.2024
Sprache Englisch
Identifikator ISSN: 2470-1343
KITopen-ID: 1000174334
HGF-Programm 47.14.01 (POF IV, LK 01) Molekular Information Processing in Cellular Systems
Erschienen in ACS Omega
Verlag American Chemical Society (ACS)
Band 9
Heft 37
Seiten 38618–38628
Vorab online veröffentlicht am 05.09.2024
Nachgewiesen in OpenAlex
Scopus
Web of Science
Dimensions

Verlagsausgabe §
DOI: 10.5445/IR/1000174334
Veröffentlicht am 19.09.2024
Originalveröffentlichung
DOI: 10.1021/acsomega.4c04179
Scopus
Zitationen: 2
Web of Science
Zitationen: 1
Dimensions
Zitationen: 2
Seitenaufrufe: 29
seit 19.09.2024
Downloads: 26
seit 22.09.2024
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