Modified sol-gel/hydrothermal method for the synthesis of microsized TiO 2 and iron-doped TiO 2 , its characterization and solar photocatalytic activity for an azo dye degradation
| Autor: | Iván Salgado-Tránsito, S. Velázquez-Martínez, Carlos A. Pineda-Arellano, A.E. Jiménez-González, Ariadna-Alicia Morales-Pérez, S. Silva-Martínez, Manuel I. Peña-Cruz |
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| Rok vydání: | 2018 |
| Předmět: |
Anatase
General Chemical Engineering General Physics and Astronomy 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Rotary evaporator 01 natural sciences Hydrothermal circulation 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Titanium dioxide Photocatalysis Calcination Irradiation 0210 nano-technology Nuclear chemistry Sol-gel |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. 359:93-101 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/j.jphotochem.2018.04.002 |
| Popis: | TiO2 and iron-doped TiO2 microsized powder is prepared by sol–gel method combined with hydrothermal treatment as an alternative to obtain high specific area under controlled conditions. Synthesis parameters such as temperature of hydrothermal treatment (125 °C–210 °C), calcination temperature (500 °C–900 °C), and calcination time (1 h–9 h) along with operational parameter as solution pH (3, 7 and 9) in the solar photocatalytic reaction are assessed. TiO2 and iron-doped TiO2 micro powders are characterized by XRD studies, FE-SEM, specific area BET and photocatalytic activity by basic orange 2 (BO2) mineralization under solar irradiation. Results showed that ultrafine anatase microspheres are generated by sol-gel/hydrothermal treatment. Iron-doped TiO2, prepared by consecutive steps such as sol-gel/hydrothermal treatment at 200 °C, washed with ethanol, followed by calcination at 600 °C and dried with a rotary evaporator, showed the highest discoloration and mineralization of BO2. Outstanding performance is observed when compared with commercial TiO2 (Hombikat). |
| Databáze: | OpenAIRE |
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