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TiO2/WO3/Au nanoarchitectures' photocatalytic activity "from degradation intermediates to catalysts' structural peculiarities" Part II: Aerogel based composites - fine details by spectroscopic means

Baia, L.; Vulpoi, A.; Radu, T.; Karacsonyi, E.; Dombi, A.; Hernadi, K.; Danciu, V.; Simon, S.; Noren, K. and Canton, Sophie LU , et al. (2014) In Applied Catalysis B: Environmental 148. p.589-600
Abstract
The "build-up" methodology of a composite photocatalyst is a critical issue regarding the showed photocatalytic performance, including the formation of intermediates. To investigate this issue TiO2/WO3/Au aerogel composites were obtained by sal-gel method and subsequent photoreduction (Au) with UV or visible light. The obtained composites' photocatalytic activity and intermediate formation profiles were evaluated using phenol as a model pollutant. XPS/UPS, XAFS and DRS were used to uncover local coordination, surface chemistry (of the different types of atoms (Ti, W, O and Au) and the band-structure (band-gap, possible electron transitions) of the obtained nanomaterials. The intermediates' evolution profile and structural peculiarities... (More)
The "build-up" methodology of a composite photocatalyst is a critical issue regarding the showed photocatalytic performance, including the formation of intermediates. To investigate this issue TiO2/WO3/Au aerogel composites were obtained by sal-gel method and subsequent photoreduction (Au) with UV or visible light. The obtained composites' photocatalytic activity and intermediate formation profiles were evaluated using phenol as a model pollutant. XPS/UPS, XAFS and DRS were used to uncover local coordination, surface chemistry (of the different types of atoms (Ti, W, O and Au) and the band-structure (band-gap, possible electron transitions) of the obtained nanomaterials. The intermediates' evolution profile and structural peculiarities were successfully correlated and it was shown that each minor structural (bulk or surface) change has a significant impact on the photocatalytic activity and intermediate formation dynamics. (c) 2013 Elsevier B.V. All rights reserved. (Less)
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publication status
published
subject
keywords
TiO2 aerogel, Tungsten (VI) oxide, Gold nanoparticles, Photodegradation, intermediates, Phenol
in
Applied Catalysis B: Environmental
volume
148
pages
589 - 600
publisher
Elsevier
external identifiers
  • wos:000332431500063
  • scopus:84893971236
ISSN
0926-3373
DOI
10.1016/j.apcatb.2013.12.034
language
English
LU publication?
yes
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cad9daef-d825-4aa3-ac06-9f1460b7fb40 (old id 4410851)
date added to LUP
2014-04-29 10:35:00
date last changed
2017-07-30 03:59:31
@article{cad9daef-d825-4aa3-ac06-9f1460b7fb40,
  abstract     = {The "build-up" methodology of a composite photocatalyst is a critical issue regarding the showed photocatalytic performance, including the formation of intermediates. To investigate this issue TiO2/WO3/Au aerogel composites were obtained by sal-gel method and subsequent photoreduction (Au) with UV or visible light. The obtained composites' photocatalytic activity and intermediate formation profiles were evaluated using phenol as a model pollutant. XPS/UPS, XAFS and DRS were used to uncover local coordination, surface chemistry (of the different types of atoms (Ti, W, O and Au) and the band-structure (band-gap, possible electron transitions) of the obtained nanomaterials. The intermediates' evolution profile and structural peculiarities were successfully correlated and it was shown that each minor structural (bulk or surface) change has a significant impact on the photocatalytic activity and intermediate formation dynamics. (c) 2013 Elsevier B.V. All rights reserved.},
  author       = {Baia, L. and Vulpoi, A. and Radu, T. and Karacsonyi, E. and Dombi, A. and Hernadi, K. and Danciu, V. and Simon, S. and Noren, K. and Canton, Sophie and Kovacs, G. and Pap, Zs},
  issn         = {0926-3373},
  keyword      = {TiO2 aerogel,Tungsten (VI) oxide,Gold nanoparticles,Photodegradation,intermediates,Phenol},
  language     = {eng},
  pages        = {589--600},
  publisher    = {Elsevier},
  series       = {Applied Catalysis B: Environmental},
  title        = {TiO2/WO3/Au nanoarchitectures' photocatalytic activity "from degradation intermediates to catalysts' structural peculiarities" Part II: Aerogel based composites - fine details by spectroscopic means},
  url          = {http://dx.doi.org/10.1016/j.apcatb.2013.12.034},
  volume       = {148},
  year         = {2014},
}