Solar photocatalytic disinfection of water using titanium dioxide graphene composites

Photo-Fenton degradation of ammonia via a manganese–iron double-active component catalyst of graphene–manganese ferrite under visible light

“…Unfortunately, since MnFe 2 O 4 alone is photocatalytically inactive under visible light irradiation [5], combination of this material with a photosensitizer such as graphene is necessary to transform it into an appropriate photocatalyst [21,22]. In fact, graphene can increase photocatalytic activities and widen spectral responses to solar irradiation [23][24][25][26][27][28]. rG-MnFe 2 O 4 hybrid materials have not been previously studied as double-effect heterogeneous photo-Fenton catalysts for degradation of recalcitrant NH 3 .…”

Photocatalytic fabrics based on reduced graphene oxide and TiO2 coatings

“…Another plus that has been observed is an increased absorption in the spectral range due to an increased band-gap of TiO 2 arising from the interaction with graphene derivatives. Several studies have focused on the employment of graphene and TiO 2 in heterogeneous photocatalysis [23][24][25][26][27][28][29][30][31][32][33]. Different graphene derivatives have been employed, such as: graphene oxide [22][23][24], reduced graphene oxide [26][27][28][29][30][31] or graphene [32,33].…”

Decontamination and disinfection of water by solar photocatalysis: The pilot plants of the Plataforma Solar de Almeria

“…The results showed an improved rate in the inactivation efficiency of the TiO 2 -RGO composite compared to P25 alone. The high activity of TiO 2 -RGO was attributed to the production of singlet oxygen with visible light excitation of the TiO2-RGO composites which would lead to E. coli inactivation, while Dusarium spores remained resistant [25]. The membrane of the cell of microorganisms is the likely target for the 1 O 2 oxidative reactions which cause bacteria cells loss of viability.…”