UVA and solar driven photocatalysis with rGO/TiO2/polysiloxane for inactivation of pathogens in recirculation aquaculture systems (RAS) streams

In this study TiO2/polysiloxane(SiBi) thin films modified with different concentrations of graphene oxide (GO) were prepared by ink-jet printing on flexible polyethylene terephthalate (PET) substrates. Prepared coatings characterized means scanning electron microscopy (SEM), transmission (TEM), X-ray photoelectron spectroscopy (XPS), ultraviolet (UPS), Raman and water contact angle measurements. During photocatalytic tests strong change color GO was observed. XPS analysis after suggests that reduction took place. studied for inactivation microorganisms naturally occurring in aquaculture under UVA natural solar irradiation. Effect rGO concentration coating target bacteria Aeromonas hydrophila Citrobacter gillenii evaluated more sensitive to comparison gillenii. Higher attributed 1 5%. The rGO/TiO2/SiBi 5% further tested salmocida, Serratia fonticola strain Lactococcus lactis light. Solar photocatalysis slightly enhanced salmocida strain, while opposite observed strain.