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

Research output: Contribution to journalArticle

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.

Details

Authors
  • L. Baia
  • A. Vulpoi
  • T. Radu
  • E. Karacsonyi
  • A. Dombi
  • K. Hernadi
  • V. Danciu
  • S. Simon
  • K. Noren
  • Sophie Canton
  • G. Kovacs
  • Zs Pap
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics

Keywords

  • TiO2 aerogel, Tungsten (VI) oxide, Gold nanoparticles, Photodegradation, intermediates, Phenol
Original languageEnglish
Pages (from-to)589-600
JournalApplied Catalysis B: Environmental
Volume148
Publication statusPublished - 2014
Publication categoryResearch
Peer-reviewedYes

Bibliographic note

The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Synchrotron Radiation Research (011013009), Chemical Physics (S) (011001060)