Artículo
Synthesis and photocatalytic activity of titania monoliths prepared with controlled macro- and mesopore structure
Drisko, Glenna L.; Zelcer, Andrés
; Wang, Xingdong; Caruso, Rachel A.; Soler Illia, Galo Juan de Avila Arturo
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Fecha de publicación:
07/2012
Editorial:
American Chemical Society
Revista:
ACS Applied Materials & Interfaces
ISSN:
1944-8244
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Herein, we report a one-pot synthesis of crack-free titania monoliths with hierarchical macro-mesoporosity and crystalline anatase walls. Bimodal macroporosity is created through the polymer-induced phase separation of poly(furfuryl alcohol). The cationic polymerization of furfuryl alcohol is performed in situ and subsequently the polymer becomes immiscible with the aqueous phase, which includes titanic acid. Addition of template, Pluronic F127, increases the mesopore volume and diameter of the resulting titania, as the poly(ethylene glycol) block interacts with the titania precursor, leading to assisted assembly of the metal oxide framework. The hydrophobic poly(propylene glycol) micelle core could itself be swollen with monomeric and oligomeric furfuryl alcohol, allowing for mesopores as large as 18 nm. Variations in synthesis parameters affect porosity; for instance furfuryl alcohol content changes the size and texture of the macropores, water content changes the grain size of the titania and Pluronic F127 content changes the size and volume of the mesopore. Morphological manipulation improves the photocatalytic degradation of methylene blue. Light can penetrate several millimeters into the porous monolith, giving these materials possible application in commercial devices.
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Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Articulos de SEDE CENTRAL
Citación
Drisko, Glenna L.; Zelcer, Andrés; Wang, Xingdong; Caruso, Rachel A.; Soler Illia, Galo Juan de Avila Arturo; Synthesis and photocatalytic activity of titania monoliths prepared with controlled macro- and mesopore structure; American Chemical Society; ACS Applied Materials & Interfaces; 4; 8; 7-2012; 4123-4130
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