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Abstract <p>TiO<sub>2</sub>/acrylonitrile copolymer (CPAN) nanocomposites containing 0.01 and 0.03 wt % TiO<sub>2</sub> nanoparticles were prepared to investigate the effect of composition on their structure, surface wettability, and photocatalytic activity. The composites were studied by IR spectroscopy, X-ray powder diffraction (XRD), and contact angle measurements. XRD confirmed the presence of anatase TiO<sub>2</sub> with an average grain size of about 19 nm. The incorporation of TiO<sub>2</sub> increased the initial water contact angle (θ) from 71.1° for CPAN to 72.3° for TiO<sub>2</sub>/CPAN-0.03 due to the formation of a conjugated bond system (CBS), as evidenced by an increase in the <i>I</i><sub>C=N</sub>/<i>I</i><sub>C≡N</sub> ratio from 1.379 to 1.542. Upon exposure to water, the TiO<sub>2</sub>/CPAN-0.03 composite exhibited the most pronounced recovery of hydrophilicity (Δθ = 7.5° in 2 min), attributed to hydrolysis processes. Photocatalytic tests under UV exposure showed the highest methylene blue (MB) degradation of 26.87% in 1 h for the 0.03 wt % TiO<sub>2</sub> composite. The IR spectra recorded after irradiation confirmed the integrity of the CPAN matrix with the enhanced formation of conjugated structures as evidenced by strengthening of C=C, C=O, and O–H bands. The results demonstrate the potential of TiO<sub>2</sub>/CPAN nanocomposites for self-cleaning coating applications.</p>

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Photocatalytic Activity of TiO2/Acrylonitrile Copolymer Nanocomposites

  • 期刊论文

  • 发表日期：

    2026年3月1日

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  • A. I. Prudnikov,
  • V. V. Kozlov,
  • M. A. Sitnov

摘要

Abstract

TiO2/acrylonitrile copolymer (CPAN) nanocomposites containing 0.01 and 0.03 wt % TiO2 nanoparticles were prepared to investigate the effect of composition on their structure, surface wettability, and photocatalytic activity. The composites were studied by IR spectroscopy, X-ray powder diffraction (XRD), and contact angle measurements. XRD confirmed the presence of anatase TiO2 with an average grain size of about 19 nm. The incorporation of TiO2 increased the initial water contact angle (θ) from 71.1° for CPAN to 72.3° for TiO2/CPAN-0.03 due to the formation of a conjugated bond system (CBS), as evidenced by an increase in the IC=N/IC≡N ratio from 1.379 to 1.542. Upon exposure to water, the TiO2/CPAN-0.03 composite exhibited the most pronounced recovery of hydrophilicity (Δθ = 7.5° in 2 min), attributed to hydrolysis processes. Photocatalytic tests under UV exposure showed the highest methylene blue (MB) degradation of 26.87% in 1 h for the 0.03 wt % TiO2 composite. The IR spectra recorded after irradiation confirmed the integrity of the CPAN matrix with the enhanced formation of conjugated structures as evidenced by strengthening of C=C, C=O, and O–H bands. The results demonstrate the potential of TiO2/CPAN nanocomposites for self-cleaning coating applications.