Produção Nacional
Revisado por pares
Synthesis, Characterization, and Photocatalytic Activity of Pure and N-, B-, or Ag- Doped TiO2
2017; Brazilian Chemical Society; Linguagem: Inglês
10.21577/0103-5053.20170040
ISSN1678-4790
AutoresPaula C. S. Bezerra, Rodrigo Pereira Cavalcante, Aline Garcia, Heberton Wender, Marco António Utrera Martines, Gleison Antônio Casagrande, Jaime Giménez, P. Marco, S. A. Oliveira, Amílcar Machulek,
Tópico(s)TiO2 Photocatalysis and Solar Cells
ResumoThis article reports the synthesis and characterization of pure and N-, B-, and Ag-doped TiO 2 and the ability of these oxides to photodegrade methylene blue (MB) under sunlight or UV-ABC radiation.The compounds were synthesized using the sol-gel method and characterized by scanning electron microscopy, X-ray diffraction, diffuse reflectance spectroscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray photoelectron spectroscopy.Photocatalytic efficiency was significantly increased by N-doping, resulting in 98% MB decomposition under UV-ABC irradiation for 180 min.Ag-and B-doped TiO 2 lowered MB degradation rates to 52 and 73%, respectively, compared with pure TiO 2 .The same behavior was observed with exposure to UV-Vis, with 88, 65, 60, and 42% MB removal with N-doped, pure, B-doped, and Ag-doped TiO 2 , respectively.Under visible light alone, N-doped TiO 2 exhibited higher photocatalytic efficiency than commercial P25-type TiO 2 .Photocatalysis with N-doped TiO 2 proved to be a promising alternative for MB degradation, given the potential of employing solar energy, thus minimizing operating costs.
Referência(s)