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<p>In this study, Titanium dioxide (TiO<sub>2</sub>) thin films integrated with multi-walled carbon nanotubes (MWCNT) were synthesized using the spin coating method to examine their enhanced photocatalytic properties. The films were deposited on glass substrates and subsequently annealed to improve crystallinity. When comparing TiO<sub>2</sub>/MWCNT films to pristine TiO<sub>2</sub>, UV-Vis analysis showed a slight red shift and the optical band gap reduces from 3.75&#xa0;eV to 3.65&#xa0;eV. XRD analysis verified and preserved the anatase phase of TiO<sub>2</sub>. The chemical interactions between TiO<sub>2</sub> and MWCNT that led to the enhanced photocatalytic activity were validated by FTIR characterization. While FESEM images showed a uniformly distributed granular morphology, the particle size was found to be 25.7&#xa0;nm and 26.3&#xa0;nm for pristine TiO<sub>2</sub> and TiO<sub>2</sub>/MWCNT films respectively, and PL studies revealed a decreased rate of photogenerated electron-hole pair recombination in the composite films. Malachite green degradation under visible light irradiation has been used to assess the photocatalytic activity. Due to improved electron transport, decreased electron-hole recombination and increased surface area, the TiO<sub>2</sub>/MWCNT composite films demonstrated significantly higher photocatalytic efficiency of 82% in 180&#xa0;min, which is greater than pristine TiO<sub>2</sub>. These results suggest that the integration of MWCNTs is a valuable technique for enhancing the photocatalytic performance of TiO<sub>2</sub> thin films.</p>

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Effective visible light driven TiO2/MWCNT composite thin film based photocatalytic degradation of textile dye

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • Chris Monica Elango,
  • Paul Mary Deborrah Samuel,
  • Jeyakumaran Natarajan

摘要

In this study, Titanium dioxide (TiO2) thin films integrated with multi-walled carbon nanotubes (MWCNT) were synthesized using the spin coating method to examine their enhanced photocatalytic properties. The films were deposited on glass substrates and subsequently annealed to improve crystallinity. When comparing TiO2/MWCNT films to pristine TiO2, UV-Vis analysis showed a slight red shift and the optical band gap reduces from 3.75 eV to 3.65 eV. XRD analysis verified and preserved the anatase phase of TiO2. The chemical interactions between TiO2 and MWCNT that led to the enhanced photocatalytic activity were validated by FTIR characterization. While FESEM images showed a uniformly distributed granular morphology, the particle size was found to be 25.7 nm and 26.3 nm for pristine TiO2 and TiO2/MWCNT films respectively, and PL studies revealed a decreased rate of photogenerated electron-hole pair recombination in the composite films. Malachite green degradation under visible light irradiation has been used to assess the photocatalytic activity. Due to improved electron transport, decreased electron-hole recombination and increased surface area, the TiO2/MWCNT composite films demonstrated significantly higher photocatalytic efficiency of 82% in 180 min, which is greater than pristine TiO2. These results suggest that the integration of MWCNTs is a valuable technique for enhancing the photocatalytic performance of TiO2 thin films.