Artigo de peri??dico
Visible-light photocatalytic activity and recyclability of N-doped TiO2 films grown by MOCVD
Atividade fotocatal??tica sob luz vis??vel e reutiliza????o de filmes de TiO2 dopados com N crescidos por MOCVD
Registro en:
0366-6913
380
66
10.1590/0366-69132020663802957
0000-0002-1423-871X
0000-0002-1797-9652
Sem Percentil
28.00
Autor
OLIVEIRA, E.C. de
BENTO, R.T.
CORREA, O.V.
PILLIS, M.F.
Resumen
Nitrogen-doped TiO2 films were grown on borosilicate glass substrates at 400 ??C by the metallorganic chemical vapor deposition
(MOCVD) for removing dye from water under visible light. The effect of N-doping on the structural, surface, and photocatalytic
properties of films was evaluated. X-ray photoelectron spectroscopy (XPS) analyses revealed that 1.56 and 2.44 at% of nitrogen
were incorporated into the films by varying the NH3 flux during the growth. Methyl orange dye degradation experiments showed
that the N-doped films presented photoactivity under visible light. The film containing 2.44 at% of nitrogen exhibited the best
photocatalytic behavior, with 55% of efficiency. Recyclability tests under visible light showed that the film efficiency dropped
gradually after each test. N-TiO2 films grown by MOCVD have the potential to be used in environmental applications by removing
pollutants using a green method under sunlight or even under internal illumination, although its reuse is limited. 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