THIN LAYER PHOTOCATALYSTS OF TiO₂-Ag COMPOSITES

Authors

  • Borbála TEGZE Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Centre for Colloid Chemistry, Budapest University of Technology and Economics, Hungary. Corresponding author: zhorvolgyi@mail.bme.hu.
  • Emőke ALBERT Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Centre for Colloid Chemistry, Budapest University of Technology and Economics, Hungary. Corresponding author: zhorvolgyi@mail.bme.hu.
  • Boglárka DIKÓ Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Centre for Colloid Chemistry, Budapest University of Technology and Economics, Hungary. Corresponding author: zhorvolgyi@mail.bme.hu.
  • János MADARÁSZ Department of Inorganic and Analytical Chemistry, Technical Analytical Chemistry Research Group, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Hungary. Corresponding author: zhorvolgyi@mail.bme.hu.
  • György SÁFRÁN Centre for Energy Research, Institute for Technical Physics and Materials Science, Budapest, Hungary. Corresponding author: zhorvolgyi@mail.bme.hu. https://orcid.org/0000-0003-0485-2801
  • Zoltán HÓRVÖLGYI Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Centre for Colloid Chemistry, Budapest University of Technology and Economics, Hungary. Email: zhorvolgyi@mail.bme.hu. https://orcid.org/0000-0002-8512-1682
  • Zoltán HÓRVÖLGYI Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Centre for Colloid Chemistry, Budapest University of Technology and Economics, Hungary. Email: zhorvolgyi@mail.bme.hu. https://orcid.org/0000-0002-8512-1682

DOI:

https://doi.org/10.24193/subbchem.2019.3.07

Keywords:

TiO2, photocatalysis, self-cleaning, dye degradation, sol-gel coatings

Abstract

Mesoporous TiO2 coatings were prepared by sol-gel dip-coating method on glass and SiO2 coated glass substrates. They were modified with silver by two different methods: impregnation of as-prepared coatings in AgNO3 aqueous solution; coating deposition from precursor sols containing AgNO3. Transmittance spectra, refractive index, layer thickness and porosity were determined by UV-Vis spectroscopy. Crystallinity of the samples was characterized by XRD, and the morphology and structure by HR-TEM. Photoinduced wettability conversion of the samples was studied, and it was found that the presence of the SiO2 barrier layer and the silver content had significant effect on the wetting behaviour. The photoactivity and reusability of the samples were investigated with methyl orange dye degradation under ultra-violet (UV) irradiation. TiO2 coatings impregnated in 1M AgNO3 solution were found to be the most stable photocatalyst system.

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STUDIA UBB CHEMIA, Volume 64 (LXIV), No. 3, September 2019

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Published

2019-09-30

How to Cite

TEGZE, B. ., ALBERT, E. ., DIKÓ, B. ., MADARÁSZ, J. ., SÁFRÁN, G. ., HÓRVÖLGYI, Z. ., & HÓRVÖLGYI, Z. . (2019). THIN LAYER PHOTOCATALYSTS OF TiO₂-Ag COMPOSITES. Studia Universitatis Babeș-Bolyai Chemia, 64(3), 81–98. https://doi.org/10.24193/subbchem.2019.3.07

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Volume 64, No. 3, 2019

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