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PPI-dendrimer-functionalized magnetic metal-organic framework (fe3o4@mof@ppi) with high adsorption capacity for sustainable wastewater treatment

Shahriyari Far, H ; Sharif University of Technology | 2020

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  1. Type of Document: Article
  2. DOI: 10.1021/acsami.0c04953
  3. Publisher: American Chemical Society , 2020
  4. Abstract:
  5. Herein, a magnetic zirconium-based metal-organic framework nanocomposite was synthesized by a simple solvothermal method and used as an adsorbent for the removal of direct and acid dyes from aqueous solution. To enhance its adsorption performance, poly(propyleneimine) dendrimer was used to functionalize the as-synthesized magnetic porous nanocomposite. The dendrimer-functionalized magnetic nanocomposite was characterized by field-emission scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption/desorption isotherms, and vibration sample magnetometer. The obtained results revealed the successful synthesis and functionalization of the magnetic nanocomposite. The adsorbents exhibited good magnetic properties with high saturation magnetization and high specific surface area. The adsorption isotherms and kinetics of anionic dyes were described by the Freundlich and pseudo-second-order models, respectively. It was found that the kinetics of adsorption of both the investigated dyes by the dendrimer-functionalized magnetic composite is considerably faster than the magnetic composite under the same condition. The adsorption capacity of the dendrimer-functionalized magnetic composite for investigated direct and acid dyes was 173.7 and 122.5 mg/g, respectively, which was higher than those of the existing magnetic adsorbents. This work provides new insights into the synthesis and application of hybrid magnetic adsorbents with synergistic properties of nanoporous metal-organic frameworks and dendrimer with a large number of functional groups for the removal of organic dyes. Copyright © 2020 American Chemical Society
  6. Keywords:
  7. Adsorption ; Dendrimer ; Magnetic ; Metal-organic framework ; Adsorption isotherms ; Dendrimers ; Field emission microscopes ; Fourier transform infrared spectroscopy ; Gas adsorption ; Iron oxides ; Magnetite ; Metal-Organic Frameworks ; Nanocomposites ; Organic polymers ; Organometallics ; Saturation magnetization ; Scanning electron microscopy ; Stripping (dyes) ; Wastewater treatment ; Field emission scanning electron microscopy ; High adsorption capacity ; High specific surface area ; High-saturation magnetization ; Magnetic nanocomposites ; Pseudo-second order model ; Sustainable wastewater treatments ; Vibration sample magnetometers ; Chemicals removal (water treatment)
  8. Source: ACS Applied Materials and Interfaces ; Volume 12, Issue 22 , 2020 , Pages 25294-25303
  9. URL: https://pubs.acs.org/doi/10.1021/acsami.0c04953