Publication detail

Kinetics study of photocatalytic oxygen indicator reactions

DOBIÁŠ, V. FILIPI, D. VESELÁ, M. KRČMA, F. VESELÝ, M.

Original Title

Type

journal article in Web of Science

Language

English

Original Abstract

The indicators are comprised of TiO2, Remazol Brilliant Blue R, glycerol, and polymer. Two different polymer matrices, poly(vinyl acetate) (PVAC) or (carboxy)methyl cellulose (CMC) were used. The indicators were printed on a plastic foil and covered with a UV curable coating. Data for the kinetic study of photocatalytic reduction and oxidation were gathered with reflectance spectrophotometer and the kinetic analysis was based on the change of the indicator's optical density. Both indicators were successfully activated with UVA and both detected oxygen. The rate of oxidation depended on percentual oxygen concentration, increasing with increasing oxygen concentration. The PVAC based indicator was much quicker to detect oxygen than its CMC counterpart, the former having a color change response to oxygen that is easily detected by naked eye in just one minute.

Keywords

Printing; Oxygen sensing; Smart packaging; Reaction rate; Photocatalysis

Authors

DOBIÁŠ, V.; FILIPI, D.; VESELÁ, M.; KRČMA, F.; VESELÝ, M.

Released

1. 10. 2024

Publisher

ELSEVIER SCIENCE SA

Location

LAUSANNE

ISBN

1010-6030

Periodical

Journal of Photochemistry and Photobiology A:Chemistry

Year of study

455

Number

115762

State

Swiss Confederation

Pages count

URL

https://www.sciencedirect.com/science/article/pii/S101060302400306X

BibTex

@article{BUT189121,
  author="Vojtěch {Dobiáš} and Denisa {Filipi} and Mária {Veselá} and František {Krčma} and Michal {Veselý}",
  title="Kinetics study of photocatalytic oxygen indicator reactions",
  journal="Journal of Photochemistry and Photobiology A:Chemistry",
  year="2024",
  volume="455",
  number="115762",
  pages="7",
  doi="10.1016/j.jphotochem.2024.115762",
  issn="1010-6030",
  url="https://www.sciencedirect.com/science/article/pii/S101060302400306X"
}