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      https://www.ias.ac.in/article/fulltext/boms/043/0027

    • Keywords

       

      Solar-assisted; photocatalyst; kaolinite; calcination; Remazol Red.

    • Abstract

       

      Solar-assisted photocatalytic degradation of organic pollutants has emerged as efficient technology for the effective treatment of industrial wastewater. Here, we report a simple technique for the fabrication of a novel ternary photocatalystfrom kaolinite (K), TiO$_2$ (T) and ZnO (Z). The most efficient catalyst was prepared at a calcination temperature of 60$^{\circ}$C. The fabricated ternary composite was characterized using different analytical techniques including Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy, field emission-scanning electronmicroscopy and energy dispersive X-ray spectroscopy. The photocatalytic degradation was performed at room temperature (25$^{\circ}$C) using Remazol Red (RR), an anionic azo dye, as the model compound. A maximum of 98% degradation of RR was found with the ternary catalyst K$_{0.50}$T$_{0.45}$Z$_{0.05}$, which was prepared from 50% kaolinite (w/w), 45% TiO$_2$ (w/w) and 5% ZnO (w/w). The catalyst was found to be suitable for long-term repeated applications. Mechanistic investigation through radical trapping experiments confirmed hydroxyl radicals as the potential contributor to the photocatalytic degradation of RR. It is highly expected that a novel photocatalyst design such as this will pave way towards further development ofmaterials capable of hazardous dye removal from industrial effluents.

    • Author Affiliations

       

      A K M MAKSUDUL HASAN1 SHAIKAT CHANDRA DEY1 MUHAMMAD MOMINUR RAHMAN2 ABDULLAH MUHAMMAD ZAKARIA3 MITHUN SARKER1 4 MD ASHADUZZAMAN1 SAYED MD SHAMSUDDIN1

      1. Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering and Technology, University of Dhaka, Dhaka 1000, Bangladesh
      2. Department of Chemistry, Virginia Tech, Blacksburg, VA 24061, USA
      3. Département de médecine Nucléaire et Radiobiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke J1H 5N4, Canada
      4. Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41566, Republic of Korea
    • Dates

       
  • Bulletin of Materials Science | News

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