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Enhanced photocatalytic activity in low-temperature processed titania mesoporous films

Carboni, Davide and Marongiu, Daniela and Rassu, Pietro and Pinna, Alessandra and Amenitsch, Heinz and Casula, Maria Francesca and Marcelli, Augusto Claudio and Cibin, Giannantonio and Falcaro, Paolo and Malfatti, Luca and Innocenzi, Plinio (2014) Enhanced photocatalytic activity in low-temperature processed titania mesoporous films. The Journal of Physical Chemistry. C, Vol. 118 (22), p. 12000-12009. ISSN 1932-7447. eISSN 1932-7455. Article.

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DOI: 10.1021/jp501653x

Abstract

The possibility of extending the technological applications of photocatalytic mesoporous titania films relies upon the capability of lowering the processing temperature while maintaining its functional properties. Here we present a synthesis of mesoporous titania films, which makes use of a partially fluorinated surfactant Zonyl FS300 as a mesostructuring agent. The photoinduced degradation activity has been followed by FTIR spectroscopy as a function of the films’ thermal annealing, ranging from 150 up to 400 °C, by using stearic acid as a model compound. The results have been compared with the benchmark templating agent Pluronic F127 and highlighted a constantly higher activity of the Zonyl-templated films, up to 50%, throughout the range of the temperatures analyzed. Raman spectroscopy indicates that Zonyl FS300 is capable of producing nanosized titania crystals at temperatures lower than Pluronic F127. This explains the different photocatalytic response of the corresponding mesoporous thin films processed at low temperatures.

Item Type:Article
ID Code:10792
Status:Published
Refereed:Yes
Uncontrolled Keywords:Titania mesoporous films, Zonyl FS300, mesostructuring agent
Subjects:Area 09 - Ingegneria industriale e dell'informazione > ING-IND/22 Scienza e tecnologia dei materiali
Divisions:002 Altri enti e centri di ricerca del Nord Sardegna > INSTM-Consorzio Interuniversitario Nazionale per la Scienza e la Tecnologia dei Materiali, Unità di ricerca di Sassari
001 Università di Sassari > 01-a Nuovi Dipartimenti dal 2012 > Architettura, Design e Urbanistica > LMNT-Laboratorio di Scienza dei Materiali e NanoTecnologie
Publisher:American Chemical Society
ISSN:1932-7447
eISSN:1932-7455
Deposited On:11 Feb 2015 11:55

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