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    Wyświetlanie 1-2 z 2
    Tytuł:
    Loading Effect of Ag Nanoparticles on Photocatalytic Activity of TiO2 Nanorod Arrays Prepared by Hydrothermal Method
    Autorzy:
    Lee, Kwangmin
    Yoo, Daeheung
    Zakiyuddin, Ahmad
    Powiązania:
    https://bibliotekanauki.pl/articles/2049271.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    TiO2 nanorods
    Ag nanoparticles
    hydrothermal
    Electrochemical impedance spectroscopy
    UV-Vis spectroscopy
    Opis:
    Rutile-TiO2 nanorod thin films were formed on Ti disks via alkali treatment in NaOH solutions followed by heat treatment at 700°C. Ag nanoparticles were loaded on nanorods using a photo-reduction method to improve the photocatalytic properties of the prepared specimen. The surface characterization and the photo-electrochemical properties of the Ag-loaded TiO2 nanorods were investigated using a field-emission scanning electron microscope (FE-SEM), X-ray photoelectron spectroscopy (XPS), UV-Vis spectroscopy and electrochemical impedance spectroscopy (EIS). The TiO2 nanorods obtained after the heat treatment were 80 to 180 nm thick and 1 μm long. The thickness of the nanorods increased with the NaOH concentration. The UV-Vis spectra exhibit a shift in the absorption edge of the Ag-loaded TiO2 to the visible light range and further narrowing of the bandgap. The decrease in the size of the capacitive loops in the EIS spectra showed that the Ag loading effectively improved the photocatalytic activity of the TiO2 nanorods.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 3; 751-754
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Pyrolysis Conditions on the Physicochemical Properties of Graphitic Carbon Nitride for Visible-Light-Driven Photocatalytic Degradation
    Autorzy:
    Kim, Jeong Hyun
    Ji, Myeongjun
    Ryu, Cheol-Hui
    Lee, Young-In
    Powiązania:
    https://bibliotekanauki.pl/articles/351503.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    g-C3N4
    pyrolysis
    polymerization
    synthesis condition
    photocatalysis
    Opis:
    Graphitic carbon nitride (g-C3 N4 ) is an attractive photocatalyst, however, its practical photocatalytic applications are still faced with huge challenges. The aim of this research is to identify the correlation between synthetic conditions and properties of the g-C3 N4 and derive an optimum synthesis condition for improving photocatalytic activities of the g-C3 N4. In this study, novel and versatile g-C3 N4 nanosheets were synthesized by the simple thermal pyrolysis of urea. In the synthesis process, the pyrolysis temperature and the heating rate, which can have the most significant influence on the structures and properties of g-C3 N4, were set as variables, and the effects were systematically investigated. When synthesized at a relatively high temperature, the amount of material being synthesized is reduced, however it has been found to represent optical properties suitable for highly efficient photo-catalyst by the increase in the thickness and defects formed in the g-C3 N4nanosheets. The photocatalytic degradation experiment of MB dyes indicated that the highest degradation of 95.2% after the reaction for 120 min was achieved on the g-C3 N4 nanosheets synthesized at 650°C.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1111-1116
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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