Synthesis, characterization and photocatalytic activity of 1D TiO<inf>2</inf> nanostructures
Nanowire/nanorod TiO<inf>2</inf> structures of approximately 8 nm in diameter and around 1,000 nm long were synthesized by alkaline hydrothermal treatment of two different TiO<inf>2</inf> nanopowders. The first precursor was TiO<inf>2</inf> obtained by the sol-gel...
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| Otros Autores: | , , , , |
| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
IWA Publishing
2014
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
| Aporte de: | Registro referencial: Solicitar el recurso aquí |
| Sumario: | Nanowire/nanorod TiO<inf>2</inf> structures of approximately 8 nm in diameter and around 1,000 nm long were synthesized by alkaline hydrothermal treatment of two different TiO<inf>2</inf> nanopowders. The first precursor was TiO<inf>2</inf> obtained by the sol-gel process (SG-TiO<inf>2</inf>); the second was the well-known commercial TiO<inf>2</inf> P-25 (P25-TiO<inf>2</inf>). Anatase-like 1D TiO<inf>2</inf> nanostructures were obtained in both cases. The one-dimensional (1D) nanostructures synthesized from SG-TiO<inf>2</inf> powders turned into rod-like nanostructures after annealing at 400 °C for 2 h. Conversely, the nanostructures synthesized from P25-TiO<inf>2</inf> preserved the tubular structure after annealing, displaying a higher Brunauer-Emmett-Teller surface area than the first system (279 and 97 m2/g, respectively). Despite the higher surface area shown by the 1D nanostructures, in both cases the photocatalytic activity was lower than for the P25-TiO<inf>2</inf> powder. However, the rod-like nanostructures obtained from SG-TiO<inf>2</inf> displayed slightly higher efficiency than the sol-gel prepared powders. The lower photocatalytic activity of the nanostructures with respect to P-25 can be associated with the lower crystallinity of 1D TiO<inf>2</inf> in both materials. © IWA Publishing 2014. |
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| ISSN: | 02731223 |
| DOI: | 10.2166/wst.2014.312 |