The thermal stability of carbon materials in the air: Quantitative structural investigation of thermal stability of carbon materials in air

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00568905" target="_blank" >RIV/61388955:_____/23:00568905 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985891:_____/23:00568905 RIV/00216275:25310/23:39920570

Výsledek na webu

<a href="https://hdl.handle.net/11104/0340185" target="_blank" >https://hdl.handle.net/11104/0340185</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.carbon.2023.02.042" target="_blank" >10.1016/j.carbon.2023.02.042</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The thermal stability of carbon materials in the air: Quantitative structural investigation of thermal stability of carbon materials in air

Popis výsledku v původním jazyce

The variability of the nanostructure of carbon materials results in a uniquely wide range of physical and chemical properties. This work analyses how the nanostructure affects the thermal stability of 2D and 3D graphene-based materials (graphene, fullerenes, nanotubes, zeolite-templated carbon), disordered and 3D ordered mesoporous carbon materials (activated carbons, CMK-3, 3DOMM), and layered carbon materials (few-layer graphene, graphene nanoplatelets, graphite) in the air. Combination of structural, thermogravimetric and calorimetric analyses under identical conditions for all the carbon nanomaterials showed that the most decisive factor increasing the stability is the stacking of graphene layers with long-range order parallel to each other, increasing the onset oxidation temperature (Ton) with the number of graphene layers from 530 °C for graphene up to 800 °C for graphite. The unsaturated carbon atoms at the defects and edges and the bending stress in the 3D graphene layers cause that graphene, the 3D non-defective monolayer in fullerenes and the defective monolayer in zeolite-templated carbon exhibit similar stability to disordered amorphous materials, as well as 3D organised mesoporous materials. All these materials are oxidized in a narrow Ton interval from 485 to 530 °C. The most significant factor for reducing the stability is the presence of specific oxygen-containing functional groups, which decrease Ton for materials with oxidized edges and with predominant hydroxyl groups by up to 150 °C. The relationships between the carbon structure and its stability in the air facilitate targeting the nanostructure of carbon materials in relation to their stability.

Název v anglickém jazyce

The thermal stability of carbon materials in the air: Quantitative structural investigation of thermal stability of carbon materials in air

Popis výsledku anglicky

The variability of the nanostructure of carbon materials results in a uniquely wide range of physical and chemical properties. This work analyses how the nanostructure affects the thermal stability of 2D and 3D graphene-based materials (graphene, fullerenes, nanotubes, zeolite-templated carbon), disordered and 3D ordered mesoporous carbon materials (activated carbons, CMK-3, 3DOMM), and layered carbon materials (few-layer graphene, graphene nanoplatelets, graphite) in the air. Combination of structural, thermogravimetric and calorimetric analyses under identical conditions for all the carbon nanomaterials showed that the most decisive factor increasing the stability is the stacking of graphene layers with long-range order parallel to each other, increasing the onset oxidation temperature (Ton) with the number of graphene layers from 530 °C for graphene up to 800 °C for graphite. The unsaturated carbon atoms at the defects and edges and the bending stress in the 3D graphene layers cause that graphene, the 3D non-defective monolayer in fullerenes and the defective monolayer in zeolite-templated carbon exhibit similar stability to disordered amorphous materials, as well as 3D organised mesoporous materials. All these materials are oxidized in a narrow Ton interval from 485 to 530 °C. The most significant factor for reducing the stability is the presence of specific oxygen-containing functional groups, which decrease Ton for materials with oxidized edges and with predominant hydroxyl groups by up to 150 °C. The relationships between the carbon structure and its stability in the air facilitate targeting the nanostructure of carbon materials in relation to their stability.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Carbon

ISSN

0008-6223

e-ISSN

1873-3891

Svazek periodika

206

Číslo periodika v rámci svazku

MAR 2023

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

211-225

Kód UT WoS článku

000944530300001

EID výsledku v databázi Scopus

2-s2.0-85149057491