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<p>Developing advanced strategies for wastewater treatment is crucial to address the persistent challenge of organic dye pollution. In this study, we report the synthesis of a UiO-66-NH₂/MXene/NaYF₄:Yb, Tm upconversion nanoparticles (UCNPs) ternary composite using a simple sonication stirring approach. The structure and properties of the materials were verified by X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) method, Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Photoluminescence (PL), Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV–Vis DRS) analyses. The composite demonstrated a surface area of ~ 150&#xa0;m²/g and improved conductivity (0.14–0.25 mS/cm), which facilitated rapid charge transfer and suppressed recombination. Under optimized conditions (20&#xa0;mg catalyst, neutral pH 7, and 50&#xa0;mg/L initial dye concentration), the material demonstrated outstanding activity, achieving 98.7% methylene blue removal within 25&#xa0;min of near-infrared (NIR) irradiation (980&#xa0;nm). Radical scavenging and Electron Paramagnetic Resonance (EPR) confirmed •OH and •O₂⁻ as the main reactive species. The catalyst maintained &gt; 91% efficiency after five reuse cycles, indicating strong stability. These results highlight the synergistic roles of UiO-66-NH₂, MXene, and UCNPs in enabling an efficient, reusable, and solar relevant photocatalyst for sustainable wastewater purification.</p>

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Near-Infrared Driven Photocatalytic Adsorption Via UiO-66-NH₂/MXene/Upconversion Nanoparticle Ternary Composite for Ultra-Efficient Removal of Organic Dyes from Wastewater

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Ibtisam Alali,
  • Nada Alhathlaul,
  • Mha Albqmi,
  • Anwaar O. Ali,
  • Mahmoud F. Mubarak

摘要

Developing advanced strategies for wastewater treatment is crucial to address the persistent challenge of organic dye pollution. In this study, we report the synthesis of a UiO-66-NH₂/MXene/NaYF₄:Yb, Tm upconversion nanoparticles (UCNPs) ternary composite using a simple sonication stirring approach. The structure and properties of the materials were verified by X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET) method, Fourier-Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Photoluminescence (PL), Ultraviolet-Visible Diffuse Reflectance Spectroscopy (UV–Vis DRS) analyses. The composite demonstrated a surface area of ~ 150 m²/g and improved conductivity (0.14–0.25 mS/cm), which facilitated rapid charge transfer and suppressed recombination. Under optimized conditions (20 mg catalyst, neutral pH 7, and 50 mg/L initial dye concentration), the material demonstrated outstanding activity, achieving 98.7% methylene blue removal within 25 min of near-infrared (NIR) irradiation (980 nm). Radical scavenging and Electron Paramagnetic Resonance (EPR) confirmed •OH and •O₂⁻ as the main reactive species. The catalyst maintained > 91% efficiency after five reuse cycles, indicating strong stability. These results highlight the synergistic roles of UiO-66-NH₂, MXene, and UCNPs in enabling an efficient, reusable, and solar relevant photocatalyst for sustainable wastewater purification.