Počet záznamů: 1
Comparison of carbonized and activated polypyrrole globules, nanofibers, and nanotubes as conducting nanomaterials and adsorbents of organic dye
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SYSNO ASEP 0543315 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve SCOPUS Název Comparison of carbonized and activated polypyrrole globules, nanofibers, and nanotubes as conducting nanomaterials and adsorbents of organic dye Tvůrce(i) Stejskal, Jaroslav (UMCH-V) RID, ORCID, SAI
Trchová, M. (CZ)
Lapčák, L. (CZ)
Kolská, Z. (CZ)
Kohl, M. (CZ)
Pekárek, Michal (UMCH-V) ORCID
Prokeš, J. (CZ)Číslo článku 100068 Zdroj.dok. Carbon Trends. - : Elsevier
Roč. 4, July (2021)Poč.str. 11 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova conducting polymer ; polypyrrole ; nanotubes Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science CEP GA19-04859S GA ČR - Grantová agentura ČR Způsob publikování Open access Institucionální podpora UMCH-V - RVO:61389013 EID SCOPUS 85122883033 DOI 10.1016/j.cartre.2021.100068 Anotace Polypyrrole globules, nanofibers and nanotubes were activated by their carbonization at 650 °C in the 3:1 mass excess of molten potassium hydroxide in argon. They have been compared with parent polypyrroles and analogous samples obtained by the carbonization in the absence of hydroxide. The yields after activation, 12–18 wt%, were lower compared to the carbonization, which exceeded 50 wt%. The changes in molecular structure are discussed on the basis of FTIR and Raman spectra. One-dimensional morphologies, especially nanotubes, were superior to globules in most respects. They have higher conductivity close to 10 S cm−1, which was reduced by two orders of magnitude after carbonization but partly recovered after activation. The specific surface areas of nanotubes of the order of tens m2g−1 was several times higher compared with globules. They have not changed after carbonization but increased several times upon activation. The activated polypyrroles were tested as adsorbents of anionic azo dye, Reactive Black 5. Activated nanotubes performed the best in adsorption followed by parent nanotubes and nanofibers. The mechanism of dye adsorption is proposed by considering the presence of dye tautomers identified on the basis of FTIR spectra. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2022 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S2667056921000456?via%3Dihub
Počet záznamů: 1