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Memorias de investigación
Ponencias en congresos:
MORPHOLOGICALLY CONTROLLED TiO2 PHOTOACTIVE NANOPARTICLES USING
Año:2014
Áreas de investigación
  • Química,
  • Fisica y ciencias del espacio,
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
Titanium oxide is the most widely used photocatalyst because of its exceptional optical and electronic properties, strong oxidizing power, non-toxicity, chemical stability and low cost. Both theoretical and experimental studies have shown that the (001) surface of anatase TiO2 leads to an enhanced photoactivity; unfortunately that surface is energetically unfavorable so it is eliminated during crystal growth. This scenario can be modified by incorporating hydrofluoric acid (HF) during the synthesis stage: fluorine ions preferentially absorb on the surface of TiO2 nanoparticles stabilizing the ultra-reactive {001} facets. Moreover, fluorine atoms are good electron scavengers too, so they also contribute to enhance the TiO2 photoactivity. The problem is that HF is toxic and highly corrosive so its employ in a large-scale synthesis is hampered. In this frame trifluoroacetic acid (TFAA) has been recently considered as a less toxic alternative to HF. Here, we study the role of TFAA as both scavenger and morphological control agent for obtaining well-faceted anatase nanoparticles. Besides we propose a simple on-step synthesis method that allows the preparation of TFAA-modified anatase nanoparticles with specific morphology and selected stabilized facets. A broad spectrum of characterization techniques evidence that TFAA effectively adsorbs on the surface of TiO2 nanoparticles, either through the oxygen atoms of the TFAA molecule itself or as F- ions, thus stabilizing the {001} facets of anatase
Internacional
Si
Nombre congreso
Electroceramics XIV Conferenceoc
Tipo de participación
960
Lugar del congreso
Bucharest, Romania
Revisores
Si
ISBN o ISSN
DOI
Fecha inicio congreso
16/06/2014
Fecha fin congreso
20/06/2014
Desde la página
185
Hasta la página
186
Título de las actas
14th edition of ELECTROCERAMICS Conference ABSTRACTS BOOK
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Amador Caballero Cuesta (UPM)
  • Autor: Marco Peiteado Lopez (UPM)
  • Autor: TERESA JARDIEL (ICV-CSIC)
  • Autor: DAVID CALATAYUD (ICV-CSIC)
  • Autor: C. FERNANDEZ RODIGUEZ (UNLG)
  • Autor: MR ESPINO ESTEVEZ (UNLPG)
  • Autor: JM DOÑA RODRIGUEZ (UNLPG)
  • Autor: DANIEL FERNANDEZ HEVIA (INAEL)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Propiedades ópticas, eléctricas y magnéticas de materiales y sus aplicaciones (POEMMA)
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