info:eu-repo/semantics/article
Characterization and Photocatalytic Evaluation (UV-Visible) of Fe-doped TiO2 Systems Calcined at Different Temperatures
Registro en:
1203-8407
10.1515/jaots-2015-0116
2371-1175
Autor
Vargas Ramírez, Ximena María
Marín, Juan Miguel
Restrepo Vásquez, Gloria María
Institución
Resumen
ABSTRACT: There is growing interest in obtaining compounds with photocatalytic activity in the solar spectrum, and this has
led to intense research on the topic. In our laboratory, Fe-doped TiO2 was synthesized using the sol-gel method
combined with the solvothermal technique at 200°C and calcined at temperatures between 350oC and 620oC.
The samples were characterized by X-ray diffraction, Micro-Raman spectroscopy, Brunauer-Emmett-Teller
specific surface area, diffuse reflectance spectroscopy, X-ray fluorescence and photocatalytic activity. All
materials crystallized in the anatase phase. Additionally the 0.05% Fe-doped TiO2 calcined at 620°C showed the
presence of the rutile phase while 0.1% Fe-doped TiO2 calcined at 620°C showed the presence of the brookite
phase. Photoactivity was observed in the visible spectrum for 0.05% and 0.1% Fe-doped TiO2, calcined at
620oC. Visible activity was attributed to the presence of rutile and an absorption shift to the visible spectrum.
Because of the temperature increment, the crystal size grew and the surface area decreased. COL0014897