Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method
Само за регистроване кориснике
2017
Аутори
Stanciu, IrinaPredoana, Luminita

Cusu, Jeanina Pandele
Preda, Silviu

Anastasescu, Mihai

Vojisavljević, Katarina

Malic, Barbara
Zaharescu, Maria
Чланак у часопису (Објављена верзија)

Метаподаци
Приказ свих података о документуАпстракт
In order to establish the influence of the preparation method on thermal behaviour of gels obtained by the sol-gel and microwave-assisted sol-gel methods, a comparative thermal analysis study was conducted by the thermogravimetric and differential thermal analysis (TG/DTG/DTA) and evolved gas analysis (EGA) on TiO2 and V2O5-doped TiO2 gels, where TiO2:V2O5 molar ratio was set to 99.95:0.05 and 98.0:2.0. In contrast to TiO2 gels, for which the thermal behaviour was not significantly influenced by the preparation method, the microwave-irradiated binary samples showed a more complex and prolonged decomposition compared to their non-irradiated counterparts. This observation was correlated with influence of microwaves in enhancing the reaction rate between the Ti and V reagents leading to formation of more complex compositions of gels. Based on TG/DTG/DTA results, the temperatures of 300 and 450 A degrees C were chosen for the processing of powders in air. All samples thermally treated at 3...00 and 450 A degrees C crystallized in a single anatase phase except the TiO2:V2O5 with a molar ratio 99.95:0.05, obtained by microwave-assisted sol-gel method that contains also small amount of rutile phase. At 550 A degrees C all samples contain mixture of anatase and rutile phases.
Кључне речи:
TiO2-based gels / Thermal behaviour / Microwave-assisted sol-gel methodИзвор:
Journal of Thermal Analysis and Calorimetry, 2017, 130, 2, 639-651Издавач:
- Springer, Dordrecht
Финансирање / пројекти:
- research programme "Materials Science and Advanced Methods for Characterization" of "Ilie Murgulescu" Institute of Physical Chemistry - Roumanian Academy [PN-IIPT-PCCA-2013-4(0864)-(94/2014)]
- EU (ERDF)European Commission
- Roumanian Government [19/01.03.2009]
- Slovenian Research AgencySlovenian Research Agency - Slovenia [P2-0105]
DOI: 10.1007/s10973-017-6478-y
ISSN: 1388-6150
WoS: 000413264100003
Scopus: 2-s2.0-85020306631
Институција/група
Institut za multidisciplinarna istraživanjaTY - JOUR AU - Stanciu, Irina AU - Predoana, Luminita AU - Cusu, Jeanina Pandele AU - Preda, Silviu AU - Anastasescu, Mihai AU - Vojisavljević, Katarina AU - Malic, Barbara AU - Zaharescu, Maria PY - 2017 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1040 AB - In order to establish the influence of the preparation method on thermal behaviour of gels obtained by the sol-gel and microwave-assisted sol-gel methods, a comparative thermal analysis study was conducted by the thermogravimetric and differential thermal analysis (TG/DTG/DTA) and evolved gas analysis (EGA) on TiO2 and V2O5-doped TiO2 gels, where TiO2:V2O5 molar ratio was set to 99.95:0.05 and 98.0:2.0. In contrast to TiO2 gels, for which the thermal behaviour was not significantly influenced by the preparation method, the microwave-irradiated binary samples showed a more complex and prolonged decomposition compared to their non-irradiated counterparts. This observation was correlated with influence of microwaves in enhancing the reaction rate between the Ti and V reagents leading to formation of more complex compositions of gels. Based on TG/DTG/DTA results, the temperatures of 300 and 450 A degrees C were chosen for the processing of powders in air. All samples thermally treated at 300 and 450 A degrees C crystallized in a single anatase phase except the TiO2:V2O5 with a molar ratio 99.95:0.05, obtained by microwave-assisted sol-gel method that contains also small amount of rutile phase. At 550 A degrees C all samples contain mixture of anatase and rutile phases. PB - Springer, Dordrecht T2 - Journal of Thermal Analysis and Calorimetry T1 - Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method EP - 651 IS - 2 SP - 639 VL - 130 DO - 10.1007/s10973-017-6478-y ER -
@article{ author = "Stanciu, Irina and Predoana, Luminita and Cusu, Jeanina Pandele and Preda, Silviu and Anastasescu, Mihai and Vojisavljević, Katarina and Malic, Barbara and Zaharescu, Maria", year = "2017", abstract = "In order to establish the influence of the preparation method on thermal behaviour of gels obtained by the sol-gel and microwave-assisted sol-gel methods, a comparative thermal analysis study was conducted by the thermogravimetric and differential thermal analysis (TG/DTG/DTA) and evolved gas analysis (EGA) on TiO2 and V2O5-doped TiO2 gels, where TiO2:V2O5 molar ratio was set to 99.95:0.05 and 98.0:2.0. In contrast to TiO2 gels, for which the thermal behaviour was not significantly influenced by the preparation method, the microwave-irradiated binary samples showed a more complex and prolonged decomposition compared to their non-irradiated counterparts. This observation was correlated with influence of microwaves in enhancing the reaction rate between the Ti and V reagents leading to formation of more complex compositions of gels. Based on TG/DTG/DTA results, the temperatures of 300 and 450 A degrees C were chosen for the processing of powders in air. All samples thermally treated at 300 and 450 A degrees C crystallized in a single anatase phase except the TiO2:V2O5 with a molar ratio 99.95:0.05, obtained by microwave-assisted sol-gel method that contains also small amount of rutile phase. At 550 A degrees C all samples contain mixture of anatase and rutile phases.", publisher = "Springer, Dordrecht", journal = "Journal of Thermal Analysis and Calorimetry", title = "Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method", pages = "651-639", number = "2", volume = "130", doi = "10.1007/s10973-017-6478-y" }
Stanciu, I., Predoana, L., Cusu, J. P., Preda, S., Anastasescu, M., Vojisavljević, K., Malic, B.,& Zaharescu, M.. (2017). Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method. in Journal of Thermal Analysis and Calorimetry Springer, Dordrecht., 130(2), 639-651. https://doi.org/10.1007/s10973-017-6478-y
Stanciu I, Predoana L, Cusu JP, Preda S, Anastasescu M, Vojisavljević K, Malic B, Zaharescu M. Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method. in Journal of Thermal Analysis and Calorimetry. 2017;130(2):639-651. doi:10.1007/s10973-017-6478-y .
Stanciu, Irina, Predoana, Luminita, Cusu, Jeanina Pandele, Preda, Silviu, Anastasescu, Mihai, Vojisavljević, Katarina, Malic, Barbara, Zaharescu, Maria, "Thermal behaviour of the TiO2-based gels obtained by microwave-assisted sol-gel method" in Journal of Thermal Analysis and Calorimetry, 130, no. 2 (2017):639-651, https://doi.org/10.1007/s10973-017-6478-y . .