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<p>The increasing prevalence of antibiotic residues in water sources poses a significant threat to environmental and public health. In this study, a series of lanthanide-doped nanomaterials—NaDy(MoO₄)₂:Tb<sup>3</sup>⁺, NaDy(WO₄)₂:Tb<sup>3</sup>⁺, and Na₃Dy(VO₄)₂:Tb<sup>3</sup>⁺—were synthesized via a hydrothermal method and systematically characterized. These nanomaterials were evaluated for their dual functionality in photoluminescent sensing and photocatalytic degradation of nitrofurantoin (NFT), a persistent and toxic antibiotic contaminant. Among them, Na₃Dy(VO₄)₂:Tb<sup>3</sup>⁺ exhibited the highest sensitivity for NFT detection, with a detection limit of 0.38&#xa0;ppm and a Stern–Volmer constant (K_sv) of 5.05 × 10<sup>4</sup>&#xa0;M⁻<sup>1</sup>. The fluorescence quenching mechanism was attributed to luminescence resonance energy transfer (LRET), supported by a significant reduction in lifetime upon NFT exposure. NaDy(WO₄)₂:Tb<sup>3</sup>⁺ demonstrated outstanding photocatalytic performance, achieving 96% degradation of NFT under UV light within 60&#xa0;min, enabled by a low bandgap (2.98&#xa0;eV), high molar absorptivity, and enhanced generation of reactive species. These results highlight the potential of rare-earth-doped molybdate, tungstate, and vanadate nanomaterials as multifunctional platforms for environmental sensing and remediation.</p>

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Hydrothermal synthesis and dual functional performance of NaDy(MoO₄)₂:Tb3⁺, NaDy(WO₄)₂:Tb3⁺, and Na₃Dy(VO₄)₂:Tb3⁺ nanomaterials for nitrofurantoin sensing and photocatalytic degradation

  • 期刊论文

  • 发表日期：

    2025年9月21日

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  • Nidhi Bhagat,
  • Niharika,
  • Swaita Devi,
  • Richa Singhaal,
  • Charanjeet Sen,
  • Haq Nawaz Sheikh

摘要

The increasing prevalence of antibiotic residues in water sources poses a significant threat to environmental and public health. In this study, a series of lanthanide-doped nanomaterials—NaDy(MoO₄)₂:Tb3⁺, NaDy(WO₄)₂:Tb3⁺, and Na₃Dy(VO₄)₂:Tb3⁺—were synthesized via a hydrothermal method and systematically characterized. These nanomaterials were evaluated for their dual functionality in photoluminescent sensing and photocatalytic degradation of nitrofurantoin (NFT), a persistent and toxic antibiotic contaminant. Among them, Na₃Dy(VO₄)₂:Tb3⁺ exhibited the highest sensitivity for NFT detection, with a detection limit of 0.38 ppm and a Stern–Volmer constant (K_sv) of 5.05 × 104 M⁻1. The fluorescence quenching mechanism was attributed to luminescence resonance energy transfer (LRET), supported by a significant reduction in lifetime upon NFT exposure. NaDy(WO₄)₂:Tb3⁺ demonstrated outstanding photocatalytic performance, achieving 96% degradation of NFT under UV light within 60 min, enabled by a low bandgap (2.98 eV), high molar absorptivity, and enhanced generation of reactive species. These results highlight the potential of rare-earth-doped molybdate, tungstate, and vanadate nanomaterials as multifunctional platforms for environmental sensing and remediation.