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Nanotechnology

Breakthrough in Nanotechnology: UiO-66(Ce) Nanoparticles Show High Photocatalytic Activity

Strategic Insights

— 2 min read

Researchers at the Ferdowsi University of Mashhad in Iran have made a significant discovery in the field of nanotechnology. By synthesizing UiO-66(Ce), a nano-sized crystal with a high surface area, they have created a highly efficient and stable photocatalyst for wastewater treatment. The UiO-66(Ce) nanoparticles demonstrated strong activity under visible light, degrading Rhodamine B with a 92.9% efficiency in just 150 minutes using only 0.06 g/L of catalyst.

Key Takeaways:

  • The UiO-66(Ce) nanoparticles have a high surface area of 1340 m^2/g, a pore diameter of 1.64 nm, and a band gap of 2.6 eV, showing strong activity under visible light.
  • The addition of polyvinylpyrrolidone (PVP) as a capping agent improved particle size control and reduced aggregation, resulting in a reduced band gap of 2.2 eV and particle size of 110 nm.
  • The UiO-66(Ce) nanoparticles demonstrated good stability over three reuse cycles, with retention of photogenerated holes and superoxide radicals as the main active species.
  • X-ray photoelectron spectroscopy (XPS) revealed a high Ce3+ concentration, suggesting oxygen vacancies contributed to the activity.
  • Adsorption studies followed the Freundlich model (R-2 = 0.9921), indicating multilayer adsorption.
  • The UiO-66(Ce) nanoparticles achieved a degradation efficiency of 92.9 +/- 0.4% in 150 minutes using only 0.06 g/L of catalyst for 10 mg/L RhB solution.
  • The researchers concluded that PVP-assisted UiO-66(Ce) has potential as a highly efficient and stable photocatalyst for wastewater treatment.

Statistics:

  • 1340 m^2/g: The high surface area of UiO-66(Ce) nanoparticles
  • 1.64 nm: The pore diameter of UiO-66(Ce) nanoparticles
  • 2.6 eV: The band gap of UiO-66(Ce) nanoparticles
  • 2.2 eV: The reduced band gap of UiO-66(Ce) after addition of PVP
  • 110 nm: The particle size of UiO-66(Ce) after addition of PVP
  • 92.9 +/- 0.4%: The degradation efficiency of RhB using UiO-66(Ce) nanoparticles
  • 150 minutes: The time required to achieve 92.9% degradation efficiency
  • 0.06 g/L: The amount of catalyst used for 10 mg/L RhB solution
  • 0.9921: The R-squared value of the Freundlich model for adsorption studies

Sources:

  • Pvp-assisted Ce-substituted Uio-66 Nanoparticles: Engineering Photocatalytic Activity and Adsorption for Rhodamine B Degradation. Journal of Water Process Engineering, 2025;77.
  • NewsRx. Studies from Ferdowsi University of Mashhad in the Area of Nanoparticles Described (Pvp-assisted Ce-substituted Uio-66 Nanoparticles: Engineering Photocatalytic Activity and Adsorption for Rhodamine B Degradation). Journal of Engineering. October 20, 2025; p 4595.

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