Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/49929
Title: Synthesis of sol-gel pyrophyllite/TiO2 heterostructures: Effect of calcination temperature and methanol washing on photocatalytic activity
Authors: El Gaidoumi, Abdelali
Doña Rodríguez, José Miguel 
Pulido Melián, Elisenda 
González Díaz, Oscar Manuel 
Navío Santos, José Antonio
El Bali, Brahim
Kherbeche, Abdelhak
UNESCO Clasification: 330301 Tecnología de la catálisis
Keywords: Sol-gel
Pyrophyllite
Heterostructure
Photocatalysis
Methanol washing
Issue Date: 2019
Project: Sistema Completo de Caracterización de la Relación Entre Composición, Estructura y Fotoactividad de Sólidos Sintéticos Con Aplicaciones Fotocatalíticas. 
Journal: Surfaces and Interfaces 
Abstract: We successfully synthesized an efficient photoactive pyrophyllite/TiO2 heterostructures using a sol-gel route at ambient temperature. The samples were prepared by exfoliation of a pyrophyllite layered-type clay by TiO2. The prepared samples exhibited strong photocatalytic activity for the degradation of phenol. The heterostructure PTi750 (S-BET = 16.58 m(2)/g) calcined at 750 degrees C, in which the mixed phases of anatase and rutile exist (52.2% anatase/10.7% rutile), showed the highest photocatalytic activity against commercial TiO2 Aeroxide P25. The methanol washed PTi750 was 5 times faster than the corresponding unwashed sample; phenol was totally degraded with a TOC reduction of 89.2%. The materials have been characterized by: X-ray diffraction (XRD), Diffuse reflectance UV-vis spectrophotometry (UV-Vis DRS), scanning electron microscopy (SEM) and BET specific surface area.
URI: http://hdl.handle.net/10553/49929
ISSN: 2468-0230
DOI: 10.1016/j.surfin.2018.10.003
Source: Surfaces and Interfaces [ISSN 2468-0230], v. 14, p. 19-25
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