alpha-Fe2O3 versus beta-Fe2O3: Controlling the Phase of the Transformation Product of epsilon-Fe2O3 in the Fe2O3/SiO2 System

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
alpha-Fe2O3 versus beta-Fe2O3: Controlling the Phase of the Transformation Product of epsilon-Fe2O3 in the Fe2O3/SiO2 System
Original language description
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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CA - Inorganic chemistry
OECD FORD branch
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Project
<a href="/en/project/GAP204%2F10%2F0035" target="_blank" >GAP204/10/0035: Hyperfine Interactions in Nanosized and Low-Dimensional Iron Oxides</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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