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      https://www.ias.ac.in/article/fulltext/boms/044/0272

    • Keywords

       

      TiO$_2$ nanoparticles; polyurethane foam; methylene blue; photocatalysis; degradation.

    • Abstract

       

      This study investigates the combined adsorption and photocatalysis on degradation of textile dye using microporous polymer nanocomposite. First, nanocomposites were synthesized by loading TiO$_2$ nanoparticles of differentweights (0.1–0.5 g) in polyurethane (PU) foam. The synthesized nanocomposites were characterized for bulk density, sol fraction and morphology. Degradation of methylene blue (MB) dye from an aqueous model pollutant was performed usingpure TiO$_2$ nanoparticles, unloaded PU foam and TiO$_2$-loaded PU foam by exposing under UV and solar irradiations. It has been observed that degradation (due to TiO$_2$ nanoparticles) and adsorption (due to PU foam) were happening simultaneously upon irradiation under solar and UV source. This mechanism was confirmed by analysing and comparing the MB dye degradation results for pure TiO$_2$ nanoparticles (85% of dye degraded in 40 min), unloaded PU foam (40% degradation in 40 min) and TiO$_2$-loaded PU foam (95% degradation in 20 min). Experimental data show pseudo-zero-order kinetics for UV irradiation (rate constant = 0.016 h$^{–1}$), whereas solar irradiation follows first-order kinetics with rate constant 0.265 h$^{–1}$.

    • Author Affiliations

       

      MOHAMMED R CHANDAN1 SPARSH GOYAL1 MOHAMMED RIZWAN1 MOHD IMRAN2 AABID HUSSAIN SHAIK1

      1. Colloids and Polymer Research Group, School of Chemical Engineering, Vellore Institute of Technology, Vellore 632007, India
      2. Department of Chemical Engineering, Faculty of Engineering, Jazan University, PO Box 706, Jazan 45142, Saudi Arabia
    • Dates

       
  • Bulletin of Materials Science | News

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