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Wyszukujesz frazę "Morawski, J." wg kryterium: Autor

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    Wyświetlanie 1-4 z 4
    Tytuł:
    Removal of organic dye in the hybrid photocatalysis/membrane processes system
    Autorzy:
    Grzechulska-Damszel, J.
    Morawski, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/779880.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    dwutlenek tytanu
    fotokataliza
    procesy membranowe
    barwniki organiczne
    układy hybrydowe
    titanium dioxide
    photocatalysis
    membrane processes
    organic dyes
    hybrid systems
    Opis:
    The removal of azo dye Acid Red 18 in hybrid photocatalysis/membrane processes systems was investigated. The photocatalytic reactions were conducted in the reactor with photocatalyst suspended in the solution. The reaction solution was recirculated through the ultrafiltration system. A commercially available titanium dioxide (AeroxideŽ P25, Degussa, Germany) was used as a photocatalyst. The solution after the photocatalytic/UF reaction was applied as the feed for the membrane distillation process. The changes of various parameters, including the concentration of the dye, pH and the conductivity of the solution, TOC and TDS content were analyzed during the process. It was found that azo dye Acid Red 18 could be successfully decolourised in the hybrid photocatalysis/UF system. The catalyst particles were retained in the feed solution by means of the ultrafiltration membrane so the obtained permeate was free of TiO2. The application of ultrafiltration together with the photocatalytic process results in the separation of photocatalyst from the treated solution but does not give the complete removal of organic matter from the reaction mixture. Membrane distillation applied with the permeate after the photocatalysis/UF process as a feed gives a complete separation of TOC from the treated solution and the obtained product is practically pure water.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 2; 94-98
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Water purification using a novel reactor with the photoactive refill
    Autorzy:
    Grzechulska-Damszel, J.
    Morawski, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/779398.pdf
    Data publikacji:
    2009
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    dwutlenek tytanu
    fotokataliza
    reaktor przepływowy
    barwniki organiczne
    titanium dioxide
    photocatalysis
    flow reactor
    photoactive coating
    organic dyes
    Opis:
    The aim of the presented work was the removal of organic dye, Acid Red 18, from water using a novel reactor with the photoactive refill. Titanium dioxide was immobilized on the base material as a thin layer from the alcoholic suspension followed by thermal stabilization. The prepared coating exhibits high stability in repeated cycles of water treatment. The complete removal of colour was achieved in a relatively short time of 14 hours. The proposed reactor with the photoactive refill solves the problem of the necessity of the replacement of the reactor or parts of the reactor when the photocatalysts activity decreases. In the case of activity drop of the photocatalyst, only the photoactivve refill can be easily replaced.
    Źródło:
    Polish Journal of Chemical Technology; 2009, 11, 1; 61-63
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary studies of photocatalytic activity of gypsum plasters containing TiO2 co-modified with nitrogen and carbon
    Autorzy:
    Janus, M.
    Bubacz, K.
    Zatorska, J.
    Kusiak-Nejman, E.
    Czyżewski, A.
    Morawski, A. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/778867.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    titanium dioxide
    gypsum
    TiO2/N
    self-cleaning
    Reactive Red 198
    Opis:
    The conducted studies were focused on the development of the gypsum material exhibiting self-cleaning properties. To this end, the raw gypsum was mixed with unique TiO2-based photocatalysts, previously modified by nitrogen and/ or carbon doping. The photocatalytic activity of the obtained gypsum plasters was evaluated trough the degradation of model organic compound (Reactive Red 198) under UV-vis irradiation. The impact of the photocatalysts presence on the physicochemical properties of the obtained gypsum plasters was evaluated. Furthermore, the role of non-metals presence on the photocatalytic properties of the TiO2 was determined. It was confirmed that the addition of N,C co-modified titanium dioxide into gypsum bestows this material with self-cleaning properties. The highest dye removal rate was displayed by the gypsum plaster containing optimal amount (10 wt%) of co-modified TiO2/N,C photocatalyst, after 20 hours of UV-vis irradiation.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 2; 96-102
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic resonance study of co-modified (Co,N)-TiO2 nanocomposites
    Autorzy:
    Guskos, N.
    Zolnierkiewicz, G.
    Guskos, A.
    Typek, J.
    Berczynski, P.
    Dolat, D.
    Mozia, S.
    Aidinis, C.
    Morawski, A. W.
    Powiązania:
    https://bibliotekanauki.pl/articles/146542.pdf
    Data publikacji:
    2015
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    nanocomposites
    titanium dioxide
    ferromagnetic resonance
    Opis:
    Three nCo,N-TiO2 nanocomposites (where cobalt concentration index n = 1, 5 and 10 wt %) were prepared and investigated by magnetic resonance spectroscopy at room temperature. Ferromagnetic resonance (FMR) lines of magnetic cobalt agglomerated nanoparticle were dominant in all registered spectra. The relaxation processes and magnetic anisotropy of the investigated spin system essentially depended on the concentration of cobalt ions. It is suggested that the samples contained two magnetic types of sublattices forming a strongly correlated spin system. It is suggested that the existence of strongly correlated magnetic system has an essential infl uence of the photocatalytic properties of the studied nanocomposites.
    Źródło:
    Nukleonika; 2015, 60, No. 3, part 1; 411-416
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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