Comparison of carbonized and activated polypyrrole globules, nanofibers, and nanotubes as conducting nanomaterials and adsorbents of organic dye

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F21%3A00543315" target="_blank" >RIV/61389013:_____/21:00543315 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216275:25310/21:39917838 RIV/60461373:22340/21:43922748 RIV/60461373:22810/21:43922748

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2667056921000456?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2667056921000456?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cartre.2021.100068" target="_blank" >10.1016/j.cartre.2021.100068</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparison of carbonized and activated polypyrrole globules, nanofibers, and nanotubes as conducting nanomaterials and adsorbents of organic dye

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Comparison of carbonized and activated polypyrrole globules, nanofibers, and nanotubes as conducting nanomaterials and adsorbents of organic dye

Popis výsledku anglicky

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.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA19-04859S" target="_blank" >GA19-04859S: Interakce vodivých polymerů s organickými barvivy: Principy a důsledky</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Carbon Trends

ISSN

2667-0569

e-ISSN

2667-0569

Svazek periodika

4

Číslo periodika v rámci svazku

July

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

100068

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85122883033