Crystalline S-doped TiO2 photoanodes from amorphous titanium oxysulfide (TiOxSy) for photo-oxidation reactions
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2023
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S-doped TiO2 films were prepared by oxidation annealing of amorphous titanium oxysulfide (TiOxSy) at different
temperatures. According to the X-ray diffraction patterns, the films calcined at temperatures of 300–600 ◦C
showed only anatase phase, while the uncalcined sample was amorphous. The chemical composition of synthesized
TiOxSy was estimated by X-ray photoelectron spectroscopy (XPS). High-resolution S 2p spectra showed
S 2 bonds at 163.47 eV for the amorphous sample. The intensity of this signal decreased after heat treatment.
Raman spectroscopy indicated an organization of the material structure with heat treatment of the material.
Furthermore, optical characterization revealed that sulfur as dopant into the anatase TiO2 structure, shifted light
absorption from ultraviolet to the visible region. Photoeletrochemical studies developed under polychromatic
irradiation revealed superior photocurrents for samples calcined at 600 ◦C, with n-type behavior, adequate for
photo-oxidation reactions.
Como referenciar
PITOMBEIRA, DANIEL R.S.; COSTA, MARIA J.S.; ANTUNES, RENATO A.; FERREIRA, RAPHAEL O.; SILVA, REJANE M.P.; SANTOS, REGINALDO S. Crystalline S-doped TiO2 photoanodes from amorphous titanium oxysulfide (TiOxSy) for photo-oxidation reactions. Optical Materials, v. 142, p. 1-10, 2023. DOI: 10.1016/j.optmat.2023.114081. Disponível em: http://repositorio.ipen.br/handle/123456789/34378. Acesso em: 11 May 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.