Photocatalyst based on titanium or iron semiconductors for the generation of hydrogen from water upon solar irradiation
- Autores: Marco Serra
- Directores de la Tesis: Hermenegildo García Gómez (dir. tes.), Pedro Enrique Atienzar Corvillo (dir. tes.)
- Lectura: En la Universitat Politècnica de València ( España ) en 2015
- Idioma: inglés
- Tribunal Calificador de la Tesis: Miguel Ángel Miranda Alonso (presid.), Emilio J. Palomares Gil (secret.), Maria Antonia Herrero Chamorro (voc.)
- Materias:
- Enlaces
- Tesis en acceso abierto en: RiuNet
- Resumen
The objective of present thesis is to prepare and evaluate photocatalyst for hydrogen generation from water methanol mixture using solar light. This general objective has been accomplished by applying different methodology in material preparation as well as exploring the photocatalytic activity of novel semiconductors. In this way after a general introduction to the feed showing the relevance of solar fuels and in particular hydrogen generation, chapter 3 describe a procedure to optimize the nature of the cocatalyst based on noble metals. In this way Au-Pt alloy nanoparticles with different composition will be deposited on p25 and they activity correlated with the irradiation wavelength and nature of the alloy. In chapter 4 and 5 we evaluate the photocatalytic activity of materials derived from titanate nanotubes either by hydrogen annealing ad various temperature (chapter 4) or by forming heterojunction with a combination of titania nanoparticles (chapter 5). The two final chapter of this thesis report the semiconductor behaviour and the photocatalytic activity of framework phosphate either mixed valence titanium III/IV (chapter 6) or iron (chapter 7) doped with various metal. The overall results achieved show that is possible to increase the photocatalytic activity of titanium-based materials by apply concept like control of morphology, amorphization of surface of particles, formation of heterojunction and control of the cocatalyst. We have also shows behind oxide, framework phosphate can also be valuable as photocatalysts.
