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<p>The uncontrolled release of antibiotics into water bodies, often surpassing regulatory limits and reaching concentrations that favor antibiotic resistance, necessitates more effective treatment methods. This study reports the rapid, microwave-assisted synthesis of ZnS nanoparticles (ZnS NPs) under varying conditions, including thiols such as 3-Mercaptopropionic acid (MPA) and Thioglycolic acid (TGA) and different temperatures (120–180&#xa0;°C), as well as low-level Fe (II) doping. TGA-capped ZnS exhibited a 230&#xa0;nm absorbance peak, whereas MPA-capped ZnS showed a larger particle size and a 290&#xa0;nm absorbance peak, indicating different growth mechanisms. Fe doping at low concentrations (1% of doping level) promoted a red shift in the photoluminescence (from 420 to 460&#xa0;nm at 120&#xa0;°C), as well as optical quenching compared to non-doped MPA-capped ZnS nanoparticles. Notably, this doping introduced intermediate energy levels, reducing fluorescence and suggesting enhanced photocatalytic potential for contaminant degradation such as antibiotics.</p> Graphical abstract <p></p>

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Fast microwave-irradiation assisted synthesis of pure and iron-doped zinc sulfide nanoparticles

  • 期刊论文

  • 发表日期：

    2025年1月28日

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  • Sonia J. Bailón-Ruiz,
  • Angelie M. Núñez-Colón,
  • Kerianys N. Torres-Torres,
  • Yarilyn Cedeño-Mattei

摘要

The uncontrolled release of antibiotics into water bodies, often surpassing regulatory limits and reaching concentrations that favor antibiotic resistance, necessitates more effective treatment methods. This study reports the rapid, microwave-assisted synthesis of ZnS nanoparticles (ZnS NPs) under varying conditions, including thiols such as 3-Mercaptopropionic acid (MPA) and Thioglycolic acid (TGA) and different temperatures (120–180 °C), as well as low-level Fe (II) doping. TGA-capped ZnS exhibited a 230 nm absorbance peak, whereas MPA-capped ZnS showed a larger particle size and a 290 nm absorbance peak, indicating different growth mechanisms. Fe doping at low concentrations (1% of doping level) promoted a red shift in the photoluminescence (from 420 to 460 nm at 120 °C), as well as optical quenching compared to non-doped MPA-capped ZnS nanoparticles. Notably, this doping introduced intermediate energy levels, reducing fluorescence and suggesting enhanced photocatalytic potential for contaminant degradation such as antibiotics.

Graphical abstract