Artigo de peri??dico
On the surface chemistry and the reuse of sulfur-doped TiO2 films as photocatalysts
Registro en:
0254-0584
261
10.1016/j.matchemphys.2021.124231
0000-0002-1423-871X
0000-0002-1797-9652
63.91
82.00
Autor
BENTO, RODRIGO T.
CORREA, OLANDIR V.
PILLIS, MARINA F.
Resumen
The surface chemistry and recyclability of sulfur-doped titanium dioxide (TiO2) films was evaluated. The photocatalysts
were grown by metalorganic chemical vapor deposition (MOCVD) at 400 ???C. The films were sulfur-doped
at 50 ???C by using hydrogen sulfide (H2S) as sulfur source. The photocatalytic behavior of the films was
measure by monitoring the methyl orange dye decolorization under visible light for several cycles. The films are
formed only for the anatase crystalline phase. The results demonstrated that no structural modifications or
significant differences in the morphology of the films occurred after their use. The sulfur-doped TiO2 films
presented good photocatalytic activity, with an efficiency of 72.1% under visible light in its first use. The
durability experiments suggest that even with the dye impregnation on the catalyst surface, the photocatalytic
activity of the S-doped TiO2 films remained around 70% in the first 3 cycles, which allows their practical
application for water treatment and purification under sunlight. Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq) Funda????o de Amparo ?? Pesquisa do Estado de S??o Paulo (FAPESP) CNPq: 168935/2018-0 FAPESP: 05/55861-4