Abstract
Composites with titanium dioxide (TiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> ) matrix and graphene oxide (GO) or reduce graphene oxide (rGO) filler were recently investigated as Vis-active materials in photocatalytic applications. For self-cleaning photocatalytic coatings, the targeted property is the (super)hydrophilicity. The wettability of a surface can be modified by exposure to radiation. This paper discusses the hydrophilicity variation of the TiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> -GO and TiO <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> -rGO composite thin films when exposed to UV or to UV+VIS radiation correlated with the stability of these composites under irradiation. The results outline changes in the surface hydrophilicity under irradiation mainly following the morphology and roughness modifications.
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