Título

Enhanced Photocatalytic Activity of Titania by Co-Doping with Mo and W

Autor

OSMIN AVILES GARCIA

Jaime Espino Valencia

RUBI ROMERO ROMERO

JOSE LUIS RICO CERDA

Manuel Arroyo Albiter

Dora Alicia Solís Casados

REYNA NATIVIDAD RANGEL

Nivel de Acceso

Acceso Abierto

Licencia

http://creativecommons.org/licenses/by-nc-nd/4.0

Materias

W-Mo dopants - ([2073-4344]) Titanium dioxide - ([2073-4344]) Photocatalytic activity - ([2073-4344]) BIOLOGÍA Y QUÍMICA - (CTI)

Resumen o descripción

Various W and Mo co-doped titanium dioxide (TiO2) materials were obtained through the EISA (Evaporation-Induced Self-Assembly) method and then tested as photocatalysts in the degradation of 4-chlorophenol. The synthesized materials were characterized by thermogravimetric analysis (TGA), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), Raman spectroscopy (RS), N2 physisorption, UV-vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). The results showed that the W-Mo-TiO2 catalysts have a high surface area of about 191 m2/g, and the presence of an anatase crystalline phase. The co-doped materials exhibited smaller crystallite sizes than those with one dopant, since the crystallinity is inhibited by the presence of both species. In addition, tungsten and molybdenum dopants are distributed and are incorporated into the anatase structure of TiO2, due to changes in red parameters and lattice expansion. Under our experimental conditions, the co-doped TiO2 catalyst presented 46% more 4-chlorophenol degradation than Degussa P25. The incorporation of two dopant cations in titania improved its photocatalytic performance, which was attributed to a cooperative effect by decreasing the recombination of photogenerated charges, high radiation absorption capacity, high surface areas, and low crystallinity. When TiO2 is co-doped with the same amount of both cations (1 wt.%), the highest degradation and mineralization (97% and 74%, respectively) is achieved. Quinones were the main intermediates in the 4 chlorophenol oxidation by W-Mo-TiO2 and 1,2,4-benzenetriol was incompletely degraded.

PROMEP (project 103.5/13/S257) CONACYT (project 269093). Scholarship 378292 by CONACYT

Editor

catalysts

Fecha de publicación

6 de diciembre de 2018

Tipo de publicación

Artículo

Recurso de información

http://hdl.handle.net/20.500.11799/99083

Fuente

2073-4344

Idioma

Inglés Inglés

Audiencia

Estudiantes

Investigadores

Repositorio Orígen

REPOSITORIO INSTITUCIONAL DE LA UAEM

Descargas

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