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http://hdl.handle.net/2445/120031
Title: | Synthesis, characterization, and photocatalytic activity of pure and N-, B-, or Ag- Doped TiO2 |
Author: | Bezerra, Paula C. S. Cavalcante, Rodrigo P. Garcia, Aline Wender, Heberton Martines, Marco A. U. Casagrande, Gleison A. Giménez Farreras, Jaume Marco Buj, Pilar Oliveira, Silvio C. de Machulek Jr., Amílcar |
Keywords: | Catalitzadors Radiació ultraviolada Catalysts Ultraviolet radiation |
Issue Date: | 2017 |
Publisher: | Sociedade Brasileira de Química |
Abstract: | This article reports the synthesis and characterization of pure and N-, B-, and Ag-doped TiO2 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 TiO2 lowered MB degradation rates to 52 and 73%, respectively, compared with pure TiO2. 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 TiO2, respectively. Under visible light alone, N-doped TiO2 exhibited higher photocatalytic efficiency than commercial P25-type TiO2. Photocatalysis with N-doped TiO2 proved to be a promising alternative for MB degradation, given the potential of employing solar energy, thus minimizing operating costs. |
Note: | Reproducció del document publicat a: https://doi.org/10.21577/0103-5053.20170040 |
It is part of: | Journal of the Brazilian Chemical Society, 2017, vol. 28, num. 9, p. 1788-1802 |
URI: | http://hdl.handle.net/2445/120031 |
Related resource: | https://doi.org/10.21577/0103-5053.20170040 |
ISSN: | 0103-5053 |
Appears in Collections: | Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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