Number of the records: 1
Comparison of carbonized and activated polypyrrole globules, nanofibers, and nanotubes as conducting nanomaterials and adsorbents of organic dye
- 1.
SYSNO ASEP 0543315 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve SCOPUS Title Comparison of carbonized and activated polypyrrole globules, nanofibers, and nanotubes as conducting nanomaterials and adsorbents of organic dye Author(s) 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)Article number 100068 Source Title Carbon Trends. - : Elsevier
Roč. 4, July (2021)Number of pages 11 s. Language eng - English Country GB - United Kingdom Keywords conducting polymer ; polypyrrole ; nanotubes Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA19-04859S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UMCH-V - RVO:61389013 EID SCOPUS 85122883033 DOI 10.1016/j.cartre.2021.100068 Annotation 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. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2022 Electronic address https://www.sciencedirect.com/science/article/pii/S2667056921000456?via%3Dihub
Number of the records: 1