Artigo de peri??dico
Photocatalytic activity of undoped and sulfur-doped TiO2 films grown by MOCVD for water treatment under visible light
Registro en:
0955-2219
12
39
10.1016/j.jeurceramsoc.2019.02.046
0000-0002-1423-871X
0000-0002-1797-9652
98.214
90.00
Autor
BENTO, RODRIGO T.
CORREA, OLANDIR V.
PILLIS, MARINA F.
Resumen
Titanium dioxide ceramic coatings have been used as catalysts in green technologies for water treatment.
However, without the presence of a dopant, its photocatalytic activity is limited to the ultraviolet radiation
region. The photocatalytic activity and the structural characteristics of undoped and sulfur-doped TiO2 films
grown at 400 ??C by metallorganic chemical vapor deposition (MOCVD) were studied. The photocatalytic behavior
of the films was evaluated by methyl orange dye degradation under visible light. The results suggested the
substitution of Ti4+ cations by S6+ ions into TiO2 structure of the doped samples. SO4
2??? groups were observed
on the surface. S-TiO2 film exhibited good photocatalytic activity under visible light irradiation, and the luminous
intensity strongly influences the photocatalytic behavior of the S-TiO2 films. The results supported the
idea that the sulfur-doped TiO2 films grown by MOCVD may be promising catalysts for water treatment under
sunlight or visible light bulbs.