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Nanostructured TiO2 modified by perfluoropolyethers: Gas phase photocatalytic activity

Published online by Cambridge University Press:  31 January 2011

Claudia L. Bianchi ,
Silvia Ardizzone ,
Giuseppe Cappelletti ,
Giuseppina Cerrato ,
Walter Navarrini  and
Maurizio Sansotera
Giuseppe Cappelletti
Affiliation:
Dipartimento di Chimica Fisica ed Elettrochimica, Università degli Studi di Milano, via Golgi 19, 20133 Milano, Italy
Giuseppina Cerrato
Affiliation:
Dipartimento di Chimica IFM & NIS-Interdept. Excellence Centre, Università di Torino, via Pietro Giuria, 7, 10125 Torino, Italy
Maurizio Sansotera
Affiliation:
Dipartimento di Chimica, Materiali e Ingegneria Chimica, Politecnico di Milano, via Mancinelli 7, 20131, Milano, Italy
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Abstract

A high-molecular-weight perfluoropolyether (PFPE-YR) and a perfluoropolyether containing ammonium phosphate (PFPE-F10) have been evaluated as fluorinated coating for high-surface-area titanium oxides. Coated nano-TiO2 shows hydrophobic properties and excellent buoyancy on water. In addition to photoactivity toward the degradation of toluene in gas phase, specific trial analyses have been completed to estimate the modified titanium oxide features. Brunauer–Emmett–Teller (BET) analysis for the surface area determination, ultraviolet-visible spectroscopy (UV-Vis) for the material electronic band gap, high-resolution transmission electron microscopy (HRTEM), x-ray diffraction (XRD), and x-ray photoelectron spectroscopy (XPS) for the morphology, structure, and surface composition, respectively, and water contact angle and infrared (IR) analysis have been performed to estimate the wettability and stability of coated titanium.

Keywords

NanostructurePhotochemicalTi
Type
Articles
Information
Journal of Materials Research , Volume 25 , Issue 1: Photocatalysis for Energy and Environmental Sustainability , January 2010 , pp. 96 - 103
Copyright
Copyright © Materials Research Society 2010

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