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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 |
Appears in Collections: | Artículos |
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