Fe3O4@ZrO2-SO3H Nanoparticles: A new magnetically retrievable catalyst for esterification of mono- and dicarboxylic acids

Document Type : Research Paper

Authors

Department of Applied Chemistry, Faculty of Science, University of Mohaghegh Ardabili, Ardabil, Iran

Abstract

In this work preparation of sulfonic acid functionalized magnetite encapsulated zirconia (Fe3O4@ZrO2-SO3H) has been reported. Structural, chemical, and magnetic properties of the magnetically supported catalyst have also been investigated by Fourier transform infrared (FT-IR) spectroscopy, wide angle X-ray diffraction spectroscopy (WXRD), thermal gravimetric analysis (TGA), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), vibrating sample magnetometer (VSM), Hammett acidity function and pH analysis as well as Brunauer-Emmett-Teller surface area measurement (SBET). The esterification reaction of various mono- and dicarboxylic acids with different alcohols was chosen to show the nano-catalytic activity. The reaction conditions were optimized and catalyst recovery was also demonstrated. The magnetic catalyst was magnetically separated and reused several times without significant loss of activity. 

Graphical Abstract

Fe3O4@ZrO2-SO3H Nanoparticles: A new magnetically retrievable catalyst for esterification of mono- and dicarboxylic acids

Highlights

  • A zirconia-based magnetic acid catalyst has been prepared.
  • Esterification reaction of mono- and dicarboxylic acids by the catalyst has been studied.
  • Hammett acidity function has been used for evaluation of the catalyst acidity.

Keywords

Main Subjects


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