biostudies-literatureUnknown15(15)Albiter EGraphene-TiO₂ composites have been investigated in various photocatalytic reactions showing successful synergy compared to pristine TiO₂. In the present work, graphene oxide (GO) was synthesized by the Hummers method and then reduced graphene oxide-TiO₂ composites (rGO/TiO₂) were obtained by an in situ GO photoreduction route. X-ray diffraction, FTIR, Raman, UV-vis DRS, and photoluminescence were the main characterization techniques. The obtained composites containing 1 and 3 wt.% rGO were evaluated in the cyanide (50 mg/L) oxidation and Au-cyanide complex (300 mg/L) degradation under UV-A light. The composites showed higher photocatalytic activity than TiO₂, mainly with the 1% rGO content. Cyanate and gold nanoparticles, deposited on Materials (Basel, Switzerland)5284https://www.ebi.ac.uk/biostudies/studies/S-EPMC9369652biostudies-literatureEnhancing Free Cyanide Photocatalytic Oxidation by rGO/TiO₂ P25 Composites.PMC9369652Calzada LAGarcia-Valdes JAlbiter ERojas-Garcia EBarrera-Andrade JMValenzuela MAfalseEnhancing Free Cyanide Photocatalytic Oxidation by rGO/TiO₂ P25 Composites.Graphene-TiO₂ composites have been investigated in various photocatalytic reactions showing successful synergy compared to pristine TiO₂. In the present work, graphene oxide (GO) was synthesized by the Hummers method and then reduced graphene oxide-TiO₂ composites (rGO/TiO₂) were obtained by an in situ GO photoreduction route. X-ray diffraction, FTIR, Raman, UV-vis DRS, and photoluminescence were the main characterization techniques. The obtained composites containing 1 and 3 wt.% rGO were evaluated in the cyanide (50 mg/L) oxidation and Au-cyanide complex (300 mg/L) degradation under UV-A light. The composites showed higher photocatalytic activity than TiO₂, mainly with the 1% rGO content. Cyanate and gold nanoparticles, deposited on 2022-01-01T00:00:00Z2022 Jul2025-04-18T15:47:58.306Z2025-02-19T03:32:14.413ZS-EPMC93696523595521910.3390/ma15155284