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Nanotechnology

Eco-Friendly Synthesis of Zinc Oxide Nanoparticles for Methylene Blue Removal

Strategic Insights

— 1 min read

A new research study out of the University of Monastir in Tunisia has highlighted the potential of zinc oxide nanoparticles (ZnO-NPs) synthesized from zeolitic imidazolate framework-7 (ZIF-7) for the removal of methylene blue dye from wastewater. The study, which has been peer-reviewed, utilized a range of characterization techniques, including X-ray powder diffraction, Fourier transform infrared spectroscopy, and transmission electron microscopy, to analyze the properties of the ZnO-NPs. The results showed that the ZnO-NPs achieved an adsorption efficiency of 94.7% for methylene blue, with an adsorption capacity that increased with temperature.

Key Takeaways:

  • The study utilized a green synthesis method to produce ZnO-NPs from ZIF-7, which is a cost-effective and environmentally friendly approach.
  • The characterized ZnO-NPs had a surface area of 29.93 g/m2, a nanoscale size of 3 nm, and surface hydroxyls.
  • The adsorption efficiency of ZnO-NPs for methylene blue reached 94.7% under optimal conditions (pH 7, 10 mg/L dye concentration, 0.02 g adsorbent dose).
  • The adsorption capacity of ZnO-NPs increased from 62.7 mg/g at 298 K to 85.16 mg/g at 328 K.
  • Modeling revealed that MB molecules adsorbed nonparallel to the ZnO-NP surface.

Statistics:

  • 94.7% adsorption efficiency achieved by ZnO-NPs for methylene blue.
  • Adsorption capacity increased from 62.7 mg/g at 298 K to 85.16 mg/g at 328 K.
  • ZnO-NPs had a surface area of 29.93 g/m2.
  • Diameter of ZnO-NPs was 3 nm.
  • Adsorption energy calculated to be 41.5 kJ/mol.

Sources:

  • NewsRx. New Nanoparticles Findings from University of Monastir Outlined (Eco-friendly Synthesis of Zno Nanoparticles Using Zeolitic Imidazolate Framework-7 for Methylene Blue Removal: Experimental and Theoretical Analysis). Biotech Week. May 21, 2025; p 685.
  • Eco-friendly Synthesis of Zno Nanoparticles Using Zeolitic Imidazolate Framework-7 for Methylene Blue Removal: Experimental and Theoretical Analysis. ChemistrySelect, 2025;10(16).
  • University of Monastir. Faculty of Sciences, Lab Interfaces & Adv Mat. Monastir 5019, Tunisia.

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