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      https://www.ias.ac.in/article/fulltext/boms/044/0064

    • Keywords

       

      ZnO; CQDs; AgNPs; ternary photocatalyst; methylene blue; photocatalytic degradation.

    • Abstract

       

      A photocatalyst based on a ZnO/CQDs/AgNPs ternary heterostructure was synthesized by a green and easy in-situ hydrothermal method. The carbon quantum dots (CQDs) were used in order to reduce AgNO$_3$ to form silvernanoparticles (AgNPs). The as-prepared photocatalyst was characterized by different techniques such as X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectrometer, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy and Bruner–Emmett–Teller. The optical properties of the nanocomposites were examined using UV–visible spectrophotometer. The photocatalytic activity of ZnO/CQDs/AgNPs was evaluated by degradation of methylene blue (MB) under UV light irradiation. The ternary heterostructure exhibits higher photocatalytic activity compared to pure ZnO, ZnO/CQDs and ZnO/Ag. It was found that a degradation of 98.6% of MB was achieved within 50 min of UV light irradiation. Finally, a possible mechanism is proposed to explain the photodegradation of MB by this nanocomposite.

    • Author Affiliations

       

      HAKIMA BOZETINE1 SMAIL MEZIANE1 SABRINA AZIRI1 NABILA BERKANE1 DJAOUIDA ALLAM1 SALEM BOUDINAR2 TOUFIK HADJERSI3

      1. Laboratory of Applied Chemistry and Chemical Engineering, Faculty of Science, University of Mouloud Mammeri of Tizi-Ouzou, 15000 Tizi-Ouzou, Algeria
      2. Physical Chemistry and Materials Chemistry Laboratory, University of Mouloud Mammeri of Tizi-Ouzou, 15000 Tizi-Ouzou, Algeria
      3. Research Center in Semiconductor Technology for Energy (CRTSE), 16000 Algiers, Algeria
    • Dates

       
  • Bulletin of Materials Science | News

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