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<p>Dye pollution from industrial activities has become a major environmental alarm due to its negative impact on ecosystems. Among the strategies for removing these pollutants, photocatalytic degradation using nanoparticles has shown significant promise. However, concerns have arisen regarding the potential harmful effects of nanoparticles, which have recently been classified as emerging contaminants. This study addresses these concerns by exploring a more sustainable approach using electrospun cellulose acetate (CA) nanofibers as a support for Ag<sub>2</sub>S nanoparticles in the photocatalytic degradation of dye pollutants. The nanofiber composites were synthesized through a two-stage process. First, silver nitrate was sulfurized within the CA matrix, followed by electrospinning to form nanofibers with varying Ag<sub>2</sub>S concentrations. The prepared composites were characterized using SEM–EDX, TEM, XRD, TGA, and UV–vis spectroscopy. The results revealed nanofibrous morphologies with a homogeneous nanoparticle distribution, firmly attached to the nanofibers, an acanthite structure, an average nanoparticle size of 27&#xa0;nm, and a bandgap of 2&#xa0;eV. Photocatalytic tests showed that the Ag<sub>2</sub>S/CA nanofibers exhibited high photocatalytic efficiency for the degradation of methylene blue under UV light, with degradation rates increasing as the Ag<sub>2</sub>S concentration increased. This work presents Ag<sub>2</sub>S/CA nanofiber composites as a promising and sustainable solution for dye-contaminated water treatment, addressing both the challenges of nanoparticle recovery and the potential environmental risks associated with conventional nanoparticle-based photocatalysts.</p>

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Photocatalytic degradation of water pollutants using Ag2S/cellulose acetate nanofiber composites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月4日

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  • Marcos Cota Leal,
  • Reina Vianey Quevedo Robles,
  • Claudia Vásquez López,
  • Rodrigo Castelo Ibarra,
  • Amelia Olivas

摘要

Dye pollution from industrial activities has become a major environmental alarm due to its negative impact on ecosystems. Among the strategies for removing these pollutants, photocatalytic degradation using nanoparticles has shown significant promise. However, concerns have arisen regarding the potential harmful effects of nanoparticles, which have recently been classified as emerging contaminants. This study addresses these concerns by exploring a more sustainable approach using electrospun cellulose acetate (CA) nanofibers as a support for Ag2S nanoparticles in the photocatalytic degradation of dye pollutants. The nanofiber composites were synthesized through a two-stage process. First, silver nitrate was sulfurized within the CA matrix, followed by electrospinning to form nanofibers with varying Ag2S concentrations. The prepared composites were characterized using SEM–EDX, TEM, XRD, TGA, and UV–vis spectroscopy. The results revealed nanofibrous morphologies with a homogeneous nanoparticle distribution, firmly attached to the nanofibers, an acanthite structure, an average nanoparticle size of 27 nm, and a bandgap of 2 eV. Photocatalytic tests showed that the Ag2S/CA nanofibers exhibited high photocatalytic efficiency for the degradation of methylene blue under UV light, with degradation rates increasing as the Ag2S concentration increased. This work presents Ag2S/CA nanofiber composites as a promising and sustainable solution for dye-contaminated water treatment, addressing both the challenges of nanoparticle recovery and the potential environmental risks associated with conventional nanoparticle-based photocatalysts.