Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
MORPHOLOGICALLY CONTROLLED TiO2 PHOTOACTIVE NANOPARTICLES USING
Year:2014
Research Areas
  • Chemistry,
  • Physics & space science,
  • Electronic technology and of the communications
Information
Abstract
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
International
Si
Congress
Electroceramics XIV Conference
960
Place
Bucharest, Romania
Reviewers
Si
ISBN/ISSN
0000-0000
Start Date
16/06/2014
End Date
20/06/2014
From page
185
To page
186
14th edition of ELECTROCERAMICS Conference ABSTRACTS BOOK
Participants
  • Autor: Marco Peiteado Lopez (UPM)
  • Autor: Amador Caballero Cuesta (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)
Research Group, Departaments and Institutes related
  • Creador: Centro o Instituto I+D+i: Centro de Materiales y Dispositivos Avanzados para Tecnologías de Información y Comunicaciones
S2i 2019 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)