Přístupnostní navigace
E-application
Search Search Close
Publication detail
DOBIÁŠ, V. FILIPI, D. VESELÁ, M. KRČMA, F. VESELÝ, M.
Original Title
Kinetics study of photocatalytic oxygen indicator reactions
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
7
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" }