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      https://www.ias.ac.in/article/fulltext/boms/043/0084

    • Keywords

       

      Titania; monoliths; mesoporous; visible-light; photocatalysis.

    • Abstract

       

      In this work, we report a facile route for the synthesis of worm-like mesoporous Fe$_2$O$_3$-doped TiO$_2$ monolithic composites through a direct template sol–gel method, for the photocatalytic degradation of textile dye (acid blue 113) pollutants. The monolith surface morphology and structural properties have been characterized using p-XRD, HR-SEM–EDAX, HR-TEM–SAED, TGA, UV–Vis–DRS, PLS, FTIR, XPS and BET analyses. The stoichiometric doping of Fe$_2$O$_3$ unleashes visible light photocatalytic activity through a red shift in the light absorption character of TiO$_2$, thereby narrowing the energy band gap, and an eventual increase in e$^−$$/$h$^+$ separation centres. The monolithic photocatalyst exhibits better properties in terms of surface area, pore volume and diameter. The physico-chemical parameters, such as solution pH, dopant stoichiometry, catalyst quantity, dye concentration, photo-sensitizers and light intensity have been optimized to enhance the photocatalysis efficiency. The photocatalyst exhibits complete dye mineralization within 0.5 h, and also reusable for five continuous cycles.

    • Author Affiliations

       

      S NAVEEN KUMAR1 VIVEK JAMES1 VINEETH JAMES1 M AKHILA MAHESWARI1 N SIVARAMAN2 C V S BRAHMANANDA RAO2 D PRABHAKARAN1

      1. Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology (VIT), Vellore 632014, India
      2. Fuel Chemistry Division, Materials Chemistry and Metal Fuel Cycle Group, Indira Gandhi Centre for Atomic Research (IGCAR), Kalpakkam 603102, India
    • Dates

       
  • Bulletin of Materials Science | News

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