English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/188263
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Anatase nanoparticles boundaries resulting from titanium tetrachloride hydrolysis

AuthorsSanz Lázaro, Jesús; Sobrados, Isabel ; Soria, Javier ; Yurdakal, S.; Augugliaro, V.
KeywordsTiCl4 hydrolysis
Titania preparation
Titania particles agglomeration
NMR spectroscopy
HRTEM technique
Amorphous layers
Issue Date1-Mar-2017
CitationCatalysis Today 281 (Part 1): 198-204 (2017)
AbstractAn important factor that governs solar energy transformation into electrical or chemical energy, when using nanoparticles-based devices, is the spatial location of traps limiting electron transport. Evidences have been presented indicating that the electron diffusion is strongly influenced by nanoparticle boundaries, whose characteristics depend on the particles preparation. In the present work we have studied the role of hydrated excess proton structures in the formation of anatase nanoparticles boundaries in samples prepared by TiCl hydrolysis at low temperature and strong acidic conditions. The samples, constituted by anatase nanocrystals but, mainly, by amorphous titania, are studied by H-MAS NMR, FT-IR and HRTEM. The results indicate that hydrated excess proton species, generated by solvation of bridging hydroxyls protons of highly defective anatase and/or amorphous titania chains, favor the chains bonding to anatase nanoparticles and/or their condensation at the nanoparticles surface. The chains’ bonding facilitates the anatase particles aggregation producing oriented self-assemblings. The preparation conditions determine a strong condensation of amorphous titania chains and it should favor anatase transformation into rutile.
Publisher version (URL)https://doi.org/10.1016/j.cattod.2016.06.052
Identifiersdoi: 10.1016/j.cattod.2016.06.052
issn: 0920-5861
Appears in Collections:(ICMM) Artículos
(ICV) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.