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Photocatalytic performance of porous TiO2 layers prepared by quantitative electrophoretic deposition from organic solvents

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    0487729 - ÚFCH JH 2019 RIV NL eng J - Článek v odborném periodiku
    Žouželka, Radek - Remzová, Monika - Brabec, Libor - Rathouský, Jiří
    Photocatalytic performance of porous TiO2 layers prepared by quantitative electrophoretic deposition from organic solvents.
    Applied Catalysis B - Environmental. Roč. 227, JUL 2018 (2018), s. 70-78. ISSN 0926-3373. E-ISSN 1873-3883
    Grant CEP: GA ČR(CZ) GA17-18972S; GA MŠMT(CZ) EF16_013/0001821
    Institucionální podpora: RVO:61388955
    Klíčová slova: EPD * Photocatalysis * TiO2
    Obor OECD: Physical chemistry
    Impakt faktor: 14.229, rok: 2018

    Highly-crystalline TiO2 nanoparticles coated on a suitable substrate make excellent photocatalysts for environmental
    applications. While electrophoretic deposition is frequently used to prepare such layers on a conductive
    support, this method often requires the presence of an additive to suppress nanoparticle agglomeration
    and increase particle surface charge. However, the presence of an additive can lead to contamination that negatively
    affects layer properties. To overcome this drawback, we developed an optimized electrophoretic method
    for the preparation of porous TiO2 layers, whose photocatalytic performance in the degradation of a toxic
    compound was analyzed. Our method enabled TiO2 layers (anatase, rutile and their mixture) to be quantitatively
    deposited on rigid substrates (stainless steel, FTO-glass and silicon wafers) without sintering and without the use
    of a dispersive additive. The photocatalytic performance of layers depended on the structural properties of
    titania particles, especially their allotropic form (anatase vs. rutile) and crystallinity, and on the presents of
    defects within the crystals. For well-developed crystals of anatase phase a high rate of the degradation of 4-
    chlorophenol and its almost complete mineralization were achieved. Owing to their excellent properties,
    especially stability and photocatalytic performance, the layers prepared by EPD are suitable for a broad range of
    environmental applications.
    Trvalý link: http://hdl.handle.net/11104/0282363

     
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