Environmental Science and Pollution Research

, Volume 21, Issue 19, pp 11238–11249 | Cite as

Highly active photocatalytic coatings prepared by a low-temperature method

  • Marko Kete
  • Egon Pavlica
  • Fernando Fresno
  • Gvido Bratina
  • Urška Lavrenčič Štangar
Photocatalysis: new highlights from JEP 2013


Photocatalytic properties of titanium (IV) oxide (TiO2) in anatase form can be used for various purposes, including photocatalytic purification of water. For such an application, suspended or fixed photocatalytic reactors are used. Those with fixed phase seem to be preferred due to some advantages, one of which is the avoidance of photocatalyst filtration. To avoid leaching and exfoliation of the fixed phase, an immobilization procedure leading to a good adhesion of a catalyst to a substrate is crucial. Within this work, we present physical and photocatalytic characterization results of five commercially available TiO2 photocatalysts (P25, P90, PC500, KRONOClean 7000, VPC-10) and one pigment (Hombitan LO-CR-S-M), which were successfully immobilized on glass slides by a “sol suspension” procedure. Different mechanical tests and characterization methods were used to evaluate the stability and morphology of the layers. Evaluation of photocatalytic activity was done by tests under UVA and UV–vis irradiation, using a method based on the detection of the fluorescent oxidation product of terephthalic acid (TPA), i.e., hydroxyterephthalic acid (HTPA). Aeroxide® P90 incorporated into the silica-titania binder was the most photocatalytically active layer and, unlike the others, showed significant increase of photocatalytic activity through the entire range of tested UVA irradiation intensities (2.3 mW/cm2–6.1 mW/cm2). The high mechanical stability of some photocatalytic layers allows using them in water photocatalytic purification reactions.


Photocatalysis Titanium dioxide nanoparticles Sol suspension Hydroxyterephthalic acid P25 P90 PC500 



We are grateful to Betka Goličič and Dr. Urh Černigoj from R&D department of BIA Separations for BET analyses. E.P. and G. B. acknowledge the support by the ESF Project GOSPEL (Ref.Nr: 09-EuroGRAPHENE-FP-001). This work has been also financially supported by Electrolux S.P.A. and the Slovenian Research Agency.

The doctoral study of M. Kete is partly cofinanced by the European Union through the European Social Fund. Cofinancing is carried out within the framework of the Operational Program for Human Resources Development for 2007–2013, 1. Development priority: Promoting entrepreneurship and adaptability; priority 1.3: Scholarship Scheme.

Supplementary material

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Fig. S1 (DOCX 204 kb)
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Fig. S2 (DOCX 1064 kb)
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Fig. S3 (DOCX 853 kb)
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Table S1 (DOCX 35 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Marko Kete
    • 1
  • Egon Pavlica
    • 2
  • Fernando Fresno
    • 1
  • Gvido Bratina
    • 2
  • Urška Lavrenčič Štangar
    • 1
  1. 1.Laboratory for Environmental ResearchUniversity of Nova GoricaNova GoricaSlovenia
  2. 2.Laboratory of Organic Matter PhysicsUniversity of Nova GoricaAjdovščinaSlovenia

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