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Ordered mesoporous thin films of rutile TiO2 nanocrystals mixed with amorphous Ta2O5 (Articolo in rivista)
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- Label
- Ordered mesoporous thin films of rutile TiO2 nanocrystals mixed with amorphous Ta2O5 (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1002/cphc.200700679 (literal)
- Alternative label
Wu, J. M.; Antonietti, M.; Gross. S.; Bauer, M.; Smarsly, B. M. (2008)
Ordered mesoporous thin films of rutile TiO2 nanocrystals mixed with amorphous Ta2O5
in ChemPhysChem (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Wu, J. M.; Antonietti, M.; Gross. S.; Bauer, M.; Smarsly, B. M. (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- [Smarsly, Bernd M.] Univ Giessen, Inst Chem Phys, D-35390 Giessen, Germany.
[Wu, Jin-Ming; Antonietti, Markus] Max Planck Inst Colloids & Interfaces, D-14424 Potsdam, Germany.
[Gross, Silvia] Univ Padua, CNR, ISTM, Dipartimento Sci Chim, I-35131 Padua, Italy.
[Gross, Silvia] INSTM UdR Padova, I-35131 Padua, Italy.
[Bauer, Matthias] Univ Stuttgart, Inst Chem Phys, D-70569 Stuttgart, Germany. (literal)
- Titolo
- Ordered mesoporous thin films of rutile TiO2 nanocrystals mixed with amorphous Ta2O5 (literal)
- Abstract
- Ordered mesoporous thin films of composites of rutile TiO2 nanocrystals
with amorphous Ta2O5 ore fabricated by evaporation-induced
self-assembly followed by subsequent heat treatment beyond 780 degrees
C Incorporation of selected amounts of Ta2O5 (20 mol%) in the
mesoporous TiO2 film, together with the unique mesoporous structure
itself increased the onset of crystallization temperature which is high
enough to ensure the crystallization of amorphous titania to rutile.
The ordered mesoporous structure benefits from a block-copolymer
template, which stabilizes the mesostructure of the amorphous mixed
oxides before crystallization. The surface and in-depth composition
analysis by X-ray photoelectron spectroscopy suggests a homogeneous
intermixing of the two oxides in the thin film. A detailed X-ray
absorption fine structure measurement on the composite film containing
20 mol% Ta2O5 and heated to 800 degrees C confirms the amorphous nature
of the Ta2O5 phase. Photocatalytic activity evaluation suggests that
the rutile nanocrystals in the synthesized ordered mesoporous thin film
possess good ability to assist the photodegradation of rhodamine B in
water under illumination by UV light. (literal)
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