engleski

Immobilization of titanium dioxide on rubber tiles made from recycled tyres

In this work we present the modification of existing products from recycled rubber in order to get photocatalytically active layer on the product surface (hereafter: photocatalytic rubber tiles, PRT). The advantage of photocatalysis is cheap, sustainable and environmentally friendly technology that achieves complete or partial decomposition of pollutants. The synergistic action of solar radiation and photocatalysts triggers redox reactions on the surface of photocatalysts which successfully remove sulphur dioxide, volatile organic compounds, unpleasant odours, ammonia, nitrogen oxides and other components from polluted air. [1]. Photocatalysis is achieved using titanium dioxide (TiO2) as a photocatalyst which is chemically stable, non- toxic compound, commercially available, high effective with optical electronic properties. Therefore, this paper presents the experimental results of immobilization of commercially available TiO2 P25 on rubber tiles by modified sol – gel method. Characterization of PRT in terms of crystal structure and morphology was investigated by SEM and FT-IR. Stability and environmental impact of PRT were investigated by leaching test and AAS and TOC analyses. Also, impact of dye addition on the morphology and stability of the PRT was investigated. Photocatalytic tests were done in simulated polluted atmosphere to confirm the PRT activity as new photocatalytic material. Successful immobilization of titanium dioxide on the reference rubber substrate was achieved and the PRT proved to be the most effective in terms of photocatalytic air purification even at the lowest dosage of TiO2.

titanium dioxide, photocatalysis, recycled rubber, air purification

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