Thin layer photocatalysts of TiO2-Ag composites

Borbála Tegze, Emőke Albert, Boglárka Dikó, János Madarász, György Sáfrán, Zoltán Hórvölgyi

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)81-98
Number of pages18
JournalStudia Universitatis Babes-Bolyai Chemia
Volume64
Issue number3
DOIs
Publication statusPublished - Jan 1 2019

Keywords

  • Dye degradation
  • Photocatalysis
  • Self-cleaning
  • Sol-gel coatings
  • TiO2

ASJC Scopus subject areas

  • Chemistry(all)

Fingerprint Dive into the research topics of 'Thin layer photocatalysts of TiO<sub>2</sub>-Ag composites'. Together they form a unique fingerprint.

  • Cite this