alpha-Fe2O3 versus beta-Fe2O3: Controlling the Phase of the Transformation Product of epsilon-Fe2O3 in the Fe2O3/SiO2 System
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F14%3A00429195" target="_blank" >RIV/61388980:_____/14:00429195 - isvavai.cz</a>
Výsledek na webu
<a href="http://dx.doi.org/10.1021/cg4015114" target="_blank" >http://dx.doi.org/10.1021/cg4015114</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/cg4015114" target="_blank" >10.1021/cg4015114</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
alpha-Fe2O3 versus beta-Fe2O3: Controlling the Phase of the Transformation Product of epsilon-Fe2O3 in the Fe2O3/SiO2 System
Popis výsledku v původním jazyce
The influence of added sucrose on the phase composition of iron oxide nanoparticles was studied in the Fe2O3/SiO2 nanocomposites. The nanocomposites were prepared by impregnation of mesoporous silica SBA-15 with iron nitrate containing various amounts ofsucrose and their subsequent annealing at 1100 and 1200 degrees C. The phase composition of the iron oxide nanoparticles in the prepared nanocomposites was analyzed by X-ray diffraction and Fe-57 Mossbauer spectroscopy on polycrystalline samples. Profile analysis of the X-ray diffraction maxima was used to determine the apparent crystallite size of the different polymorphs. The content of beta-Fe2O3 in the samples increased with an increasing amount of sucrose, and no beta-Fe2O3 was observed in the samples without sucrose. These samples contained only epsilon-Fe2O3 and hematite. The apparent crystallite size was found to be similar for both hematite and beta-Fe2O3. Therefore, sucrose was identified as the primary variable, which direct
Název v anglickém jazyce
alpha-Fe2O3 versus beta-Fe2O3: Controlling the Phase of the Transformation Product of epsilon-Fe2O3 in the Fe2O3/SiO2 System
Popis výsledku anglicky
The influence of added sucrose on the phase composition of iron oxide nanoparticles was studied in the Fe2O3/SiO2 nanocomposites. The nanocomposites were prepared by impregnation of mesoporous silica SBA-15 with iron nitrate containing various amounts ofsucrose and their subsequent annealing at 1100 and 1200 degrees C. The phase composition of the iron oxide nanoparticles in the prepared nanocomposites was analyzed by X-ray diffraction and Fe-57 Mossbauer spectroscopy on polycrystalline samples. Profile analysis of the X-ray diffraction maxima was used to determine the apparent crystallite size of the different polymorphs. The content of beta-Fe2O3 in the samples increased with an increasing amount of sucrose, and no beta-Fe2O3 was observed in the samples without sucrose. These samples contained only epsilon-Fe2O3 and hematite. The apparent crystallite size was found to be similar for both hematite and beta-Fe2O3. Therefore, sucrose was identified as the primary variable, which direct
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CA - Anorganická chemie
OECD FORD obor
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Návaznosti výsledku
Projekt
<a href="/cs/project/GAP204%2F10%2F0035" target="_blank" >GAP204/10/0035: Hyperjemné interakce v nanočásticích a nízkodimenzionálních oxidech železa</a><br>
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2014
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Crystal Growth & Design
ISSN
1528-7483
e-ISSN
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Svazek periodika
14
Číslo periodika v rámci svazku
3
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
8
Strana od-do
1039-1046
Kód UT WoS článku
000332684400019
EID výsledku v databázi Scopus
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