UV–vis light induced photocatalytic activity of TiO2/graphene oxide nanocomposite coatings

Abstract:

Titanium dioxide (TiO2) and TiO2 – graphene oxide (GO) composite layers were deposited by spin coating technique onto SiO2 quartz substrates. TiO2 NPs and GO platelets were used as base materials for the preparation of the starting water/acetone dispersions. Polystyrene (PS) buffer layers were deposited by drop-cast method onto the substrates surface to ensure the adherence of the pure TiO2/PS and TiO2-GO/PS composite layer. The surface morphology and physico-chemical properties of the layers have been determined and correlated with their photocatalytic properties. It was found that GO oxygen functional groups are reduced by the presence of TiO2 NPs in the composite materials. Photodegradation activity under UV–visible light irradiation was studied by measuring the concentration changes in time of organic methylene blue dye in aqueous solutions as well as the chemical oxygen demand for real …

Año de publicación:

2019

Keywords:

Fuente:

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