Thermal behavior of Fe2O3/TiO2 mesoporous gels

被引：20

作者：

Balek, V ^{[1
]}

Todorova, N

Trapalis, C

Stengl, V

Vecerníková, E

Subrt, J

Malek, Z

Kordas, G

机构：

[1] Nucl Res Inst Rez Plc, Rez 25068, Czech Republic

[2] NCSR Demokritos, Inst Sci Mat, Athens 15310, Greece

[3] ASCR, Inst Inorgan Chem, Rez 25068, Czech Republic

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2005年 / 80卷 / 02期

关键词：

annealing; DTA; EGA; emanation thermal analysis; Fe2O3/TiO2; porosity; sol-gel; surface area; thermogravimetry;

D O I：

10.1007/s10973-005-0684-8

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Titania-based photocatalytic materials were prepared by sol - gel method using Fe3+ and polyethyleneglycol (PEG(600)) 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 PEG(600) 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.

引用

页码：503 / 509

页数：7

共 25 条

[1] Emanation thermal analysis study of a sol-gel precursor for silica-titania waveguides [J].