Ref.: MmeDe22-001

Nanostructural Characterization and Enhanced Photocatalytic Performance of Silver-Embedded Titanium Dioxide-Carbon Composite Coatings

Apresentador: Samuel Pereira Cotinho

Autores (Instituição): Godoi, C.(Instituto de Pesquisas Energéticas e Nucleares); Oliveira, L.d.(Instituto de Pesquisas Energéticas e Nucleares); Cotinho, S.P.(Instituto de Pesquisas Energéticas e Nucleares); Pillis, M.F.(IPEN/CNEN); Garcia, L.M.(UFABC);

Resumo:
The research focused on exploring the nanostructural features, morphological traits, and photocatalytic performance of titanium dioxide-carbon (TiO2-C) composite coatings embedded in silver[1]. The TiO2-C coatings were produced via the sol-gel method, applied onto a glass substrate using an airbrush, and then heat treated in a muffle furnace at 500°C for 30 minutes[2]. Silver integration was accomplished by submerging the coatings in a solution containing silver nitrate and ethyl alcohol (0.01 M) post-annealing, followed by a 2-hour exposure to ultraviolet light[3]. The efficacy of the coatings in photocatalysis under visible light irradiation was assessed by monitoring the degradation of methyl orange dye over a 6-hour experimentation period.The analysis of the coatings involved X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), Raman spectroscopy, and scanning electron microscopy (SEM). The findings revealed a homogeneous dispersion of the metal across the expanded graphite surface.