Počet záznamů: 1  

Photocatalytic activity of nanostructured TiO2 coating on glass slides and optical fibers for methylene blue or methyl orange decomposition under different light excitation

  1. 1.
    SYSNO ASEP0460238
    Druh ASEPJ - Článek v odborném periodiku
    Zařazení RIVJ - Článek v odborném periodiku
    Poddruh JČlánek ve WOS
    NázevPhotocatalytic activity of nanostructured TiO2 coating on glass slides and optical fibers for methylene blue or methyl orange decomposition under different light excitation
    Tvůrce(i) Bartoň, Ivo (URE-Y)
    Matějec, Vlastimil (URE-Y)
    Matoušek, J. (CZ)
    Celkový počet autorů3
    Zdroj.dok.Journal of Photochemistry and Photobiology A-Chemistry. - : ELSEVIER SCIENCE SA - ISSN 1010-6030
    Roč. 317, 15 February (2016), s. 72-80
    Poč.str.9 s.
    Forma vydáníTištěná - P
    Jazyk dok.eng - angličtina
    Země vyd.CH - Švýcarsko
    Klíč. slovaMethyleneblue ; Glass slide ; Kinetics
    Vědní obor RIVJA - Elektronika a optoelektronika, elektrotechnika
    CEPGAP102/12/2361 GA ČR - Grantová agentura ČR
    Institucionální podporaURE-Y - RVO:67985882
    UT WOS000368953200009
    EID SCOPUS84948663456
    DOI10.1016/j.jphotochem.2015.11.009
    AnotaceThe paper presents results of the investigation of photocatalytic activity of coatings of nanoparticles of titania applied on glass slides and silica optical fiber using side excitation of the slides and fibers and direct launching of the excitation light into the fiber input face. Titania nanoparticle coatings were prepared by the alkoxide sol-gel method from titanium isopropoxide and from dispersion of anatase nanoparticles Aeroxide® P25 in water. The dip-coating technique was used for the application of the sols onto slides and fibers and a coating die for the continuous application of a sol during fiber drawing. Kinetics of decomposition of methylene blue and methyl orange solutions in water was employed to characterize the photocatalytic activity of the coatings. The measured kinetic data were fitted by a model of 1st order reaction. The 1st order rate constant related to the catalyst amount, a relative 1st order rate constant, was employed for evaluating the photocatalytic activity. It has been found that coatings fabricated from the nanoparticle dispersion are more active than those obtained by the alkoxide method. In the case of methylene blue, a value of the relative 1st order rate constant of about 1.55 ± 0.13 min-1 g-1 was obtained for coatings on slides and fibers which is practically independent of the excitation way
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