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Thermal behavior of Fe |
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| Authors: | V. Balek N. Todorova C. Trapalis V. Štengl E. Večerníková J. Šubrt Z. Malek G. Kordas |
| Affiliation: | (1) Nuclear Research Institute Řež, plc, 250 68 Řež, Czech Republic;(2) Institute of Materials Science, NCSR DEMOKRITOS, 15310 Athens, Greece;(3) Institute of Materials Science, NCSR DEMOKRITOS, 15310 Athens, Greece;(4) Institute of Inorganic Chemistry, ASCR, 250 68 Řež, Czech Republic;(5) Institute of Inorganic Chemistry, ASCR, 250 68 Řež, Czech Republic;(6) Institute of Inorganic Chemistry, ASCR, 250 68 Řež, Czech Republic;(7) Nuclear Research Institute Řež, plc, 250 68 Řež, Czech Republic;(8) Institute of Materials Science, NCSR DEMOKRITOS, 15310 Athens, Greece |
| Abstract: | Summary Titania-based photocatalytic materials were prepared by sol-gel method using Fe3+ and polyethyleneglycol (PEG600) as additives. Thermogravimetry (TG), differential thermal analysis (DTA) and evolved gas analysis (EGA) with MS detection were used to elucidate processes that take place during heating of Fe3+ containing titania gels. The microstructure development of the Fe2O3/TiO2 gel samples with and without PEG600 admixtures was characterized by emanation thermal analysis (ETA) under in situ heating in air. A mathematical model was used for the evaluation of ETA results. Surface area and porosity measurements of the samples dried at 120°C and the samples preheated for 1 h to 300 and 500°C were compared. From the XRD measurements it was confirmed that the crystallization of anatase took place after thermal heating up to 600°C. |
| Keywords: | DTA thermogravimetry emanation thermal analysis sol-gel EGA porosity surface area annealing Fe2O3/TiO2 |
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