Optimization and kinetics for Se4⁺/TiO2 enhanced photocatalytic performance against Polyethylene

Authors

  • Zaib-un-Nisa* Minhaj University Lahore Email: zaibunnisa.che@mul.edu.pk
  • Sadia Irum National University of Sciences and Technology, H-12, Islamabad Pakistan Email: zaibunnisa.che@mul.edu.pk
  • Saba Abbas Minhaj University Lahore Email: zaibunnisa.che@mul.edu.pk
  • Hafiza Nida Shehzadi Minhaj University Lahore Email: zaibunnisa.che@mul.edu.pk

DOI:

https://doi.org/10.63163/jpehss.v3i2.424

Keywords:

Se doped TiO2, Sol-Gel, Nanocatalysts, Photocatalytic activity, polyethylene, RSM optimization.

Abstract

Plastic pollution poses a significant environmental threat, with polyethylene (PE) being one of the most persistent polymers. Conventional recycling methods have limitations, necessitating innovative degradation approaches. In this study, Se⁴⁺-doped TiO₂ (TSe) nanocatalysts were synthesized via the sol-gel method with varying selenium concentrations (0.1–1 w/w%) to enhance photocatalytic performance under visible light. Characterization using XRD, Raman, BET, SEM, FTIR, PL, and UV/Vis spectroscopy confirmed successful doping, structural modifications, and a reduced bandgap (minimum 2.7 eV). Photocatalytic degradation of PE was evaluated, revealing that TSe0.5 exhibited optimal performance with a degradation efficiency of 92.2% and a recyclability of 10 cycles at 52.76% efficiency. Response surface methodology (RSM) was applied to optimize pH, temperature, and catalyst concentration, demonstrating a significant impact on degradation efficiency. The enhanced photocatalytic activity was attributed to Se⁴⁺ incorporation, leading to improved charge carrier separation, increased surface area, and extended visible light absorption. These findings highlight the potential of Se-doped TiO₂ nanocatalysts for efficient and sustainable PE degradation

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Published

2025-05-28

How to Cite

Zaib-un-Nisa*, Sadia Irum, Saba Abbas, & Hafiza Nida Shehzadi. (2025). Optimization and kinetics for Se4⁺/TiO2 enhanced photocatalytic performance against Polyethylene. Physical Education, Health and Social Sciences, 3(2), 28–44. https://doi.org/10.63163/jpehss.v3i2.424