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TitlePhotocatalytic fabrics based on reduced graphene oxide and TiO2 coatings
Author(s)Molina, J.
Fernandes, F.
Fernández, J.
Pastor, M.
Correia, A.
Souto, A. Pedro
Carneiro, Joaquim A. O.
Teixeira, V.
Cases, F.
KeywordsReduced graphene oxide
Titanium dioxide
Scanning electrochemical microscopy
Rhodamine B
Issue date23-May-2015
JournalMaterials Science and Engineering B - Advanced Functional Solid-State Materials
Abstract(s)The purpose of this work is to obtain photocatalytic fabrics based on reduced graphene oxide (RGO) and TiO2 coatings on polyester fabrics. The influence of the applied number of RGO coatings on properties such as light absorption, conductivity, electroactivity and photocatalytic properties of the fabrics was established. An improvement of these properties with the number of RGO coatings applied was obtained. FESEM, EDX, XPS and FTIR-ATR showed the incorporation of the TiO2 nanoparticles on the fabrics. FTIR-ATR showed the formation of a bidentate carboxylic ligand with titanium atoms. The photocatalytic properties of the fabrics were tested with Rhodamine B dye solutions. Photocatalytic efficiency increased with the number of RGO coatings, due to the increased light absorption, and better electrical properties. The charge transfer resistance (Rct) and its time constant (τ) decreased, indicating a better electron transfer which helps to increase the lifetime of the pair electron/hole.
DescriptionSupplementary data associated with this article can be found, in the online version, at:
AccessOpen access
Appears in Collections:CDF - GRF - Artigos/Papers (with refereeing)

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