Determination of the Surface Oxidation Degree of the Carbonaceous Materials by Quantitative TG-MS Analysis
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61988987%3A17310%2F17%3AA1701KK1" target="_blank" >RIV/61988987:17310/17:A1701KK1 - isvavai.cz</a>
Výsledek na webu
<a href="http://pubs.acs.org/doi/full/10.1021/acs.analchem.6b03914" target="_blank" >http://pubs.acs.org/doi/full/10.1021/acs.analchem.6b03914</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.analchem.6b03914" target="_blank" >10.1021/acs.analchem.6b03914</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Determination of the Surface Oxidation Degree of the Carbonaceous Materials by Quantitative TG-MS Analysis
Popis výsledku v původním jazyce
The developed quantitative TG-MS analysis was used for the determination of the surface oxidation degree of activated carbon cryogels. The surface chemistry of a prepared carbon cryogels pyrolyzed at 400 and 500 °C was modified using H3PO4, Fenton-like reaction, (NH4)2S2O8 with H2SO4 and HNO3 with H2O2 into a different surface oxidation degree. The influence of activation method and the amount of oxygen surface groups were characterized by elemental analysis, immersion calorimetry, water vapor adsorption, and Boehm titration. The obtained results from these methods were compared with the amount of surface oxygen determined by TG-MS. It was found out, that with the more intensive oxidation method (Fenton < (NH4)2S2O8 with H2SO4 < HNO3 with H2O2) the concentration of oxygen-containing surface groups increases, which lead to considerably higher parameters of immersion heat, amount of adsorbed water and acidity of the sample surface. The H3PO4 treatment of carbon cryogels causes no significant changes in the surface chemistry. The results obtained from the TG-MS analysis imply the good agreement with the results obtained from other used methods. It was proved that the quantitative TG-MS analysis could be a useful tool for the characterization of the surface of the carbonaceous materials.
Název v anglickém jazyce
Determination of the Surface Oxidation Degree of the Carbonaceous Materials by Quantitative TG-MS Analysis
Popis výsledku anglicky
The developed quantitative TG-MS analysis was used for the determination of the surface oxidation degree of activated carbon cryogels. The surface chemistry of a prepared carbon cryogels pyrolyzed at 400 and 500 °C was modified using H3PO4, Fenton-like reaction, (NH4)2S2O8 with H2SO4 and HNO3 with H2O2 into a different surface oxidation degree. The influence of activation method and the amount of oxygen surface groups were characterized by elemental analysis, immersion calorimetry, water vapor adsorption, and Boehm titration. The obtained results from these methods were compared with the amount of surface oxygen determined by TG-MS. It was found out, that with the more intensive oxidation method (Fenton < (NH4)2S2O8 with H2SO4 < HNO3 with H2O2) the concentration of oxygen-containing surface groups increases, which lead to considerably higher parameters of immersion heat, amount of adsorbed water and acidity of the sample surface. The H3PO4 treatment of carbon cryogels causes no significant changes in the surface chemistry. The results obtained from the TG-MS analysis imply the good agreement with the results obtained from other used methods. It was proved that the quantitative TG-MS analysis could be a useful tool for the characterization of the surface of the carbonaceous materials.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10406 - Analytical chemistry
Návaznosti výsledku
Projekt
<a href="/cs/project/LO1208" target="_blank" >LO1208: Teoretické aspekty energetického zpracování odpadů a ochrany prostředí před negativními dopady</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2017
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
ANAL CHEM
ISSN
0003-2700
e-ISSN
—
Svazek periodika
89
Číslo periodika v rámci svazku
January
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
15
Strana od-do
1710-1715
Kód UT WoS článku
000393738300044
EID výsledku v databázi Scopus
2-s2.0-85026788534