Solar photocatalytic degradation of phenol using pyrolitic TiO2 films deposited inside a tubing
Solar photocatalytic degradation of phenol was obtained using TiO2 films deposited inside glass tubing. TiO2 thin films inside tubing were obtained by spray-gel technique using a titanium isopropoxide solution conveniently diluted in ethanol. The gas carrier flux, air pressure and temperature were k...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2005 |
| País: | Perú |
| Institución: | Instituto Peruano de Energía Nuclear |
| Repositorio: | IPEN-Institucional |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.ipen.gob.pe:20.500.13054/435 |
| Acceso en línea: | https://hdl.handle.net/20.500.13054/435 |
| Access Level: | acceso abierto |
| Palabra clave: | Fotocatálisis Óxidos de titanio Capas finas Radiación ultravioleta Proceso de sol-gel Microscopía electrónica por barrido |
| Sumario: | Solar photocatalytic degradation of phenol was obtained using TiO2 films deposited inside glass tubing. TiO2 thin films inside tubing were obtained by spray-gel technique using a titanium isopropoxide solution conveniently diluted in ethanol. The gas carrier flux, air pressure and temperature were kept during deposition at 5 L/min, 200 kPa, and 200 °C, respectively. Experiments were performed using either the solar radiation or a 300 W lamp simulating the UVA solar radiation component. In order to concentrate the radiation a reflective surface was placed in the back part of the tube. The initial concentration of phenol solution was 20 ppm, and the phenol concentration during the experiment was followed using a standard colorimetric method when aminoantipirine reacts in the sample giving a colored complex. The volume of the phenol solution was limited with a solid aluminum rod placed axially to the glass tube. The obtained TiO2 films were amorphous, but after an annealing at 450 ºC for 1 h the films crystallize to anatase structure and present photocatalytic activity. The films morphology observed by scanning electron microscopy presented a uniform film and agglomerates of TiO2, the size of the agglomerates increases as Ti isopropoxide/ethanol molar ratio of the starting solution decreases. The precursor concentration solution and film thickness of TiO2 for phenol degradation was optimized. |
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