• DOI:10.1039/c3dt52098f
• Corpus ID: 24386900

Synthesis of sulfonic acid-functionalized Fe3O4@C nanoparticles as magnetically recyclable solid acid catalysts for acetalization reaction.

@article{Zheng2014SynthesisOS,
  title={Synthesis of sulfonic acid-functionalized Fe3O4@C nanoparticles as magnetically recyclable solid acid catalysts for acetalization reaction.},
  author={Fangcai Zheng and Qianwang Chen and Lin Hu and Nannan Yan and Xiangkai Kong},
  journal={Dalton transactions},
  year={2014},
  volume={43 3},
  pages={
          1220-7
        }
}

• F. Zheng, Qianwang Chen, +2 authors Xiangkai Kong
• Published 21 January 2014
• Chemistry
• Dalton transactions

The Fe3O4@C core-shell magnetic nanoparticles with an average size of about 190 nm were synthesized via a one-pot solvothermal process using ferrocene as a single reactant. The sulfonic acid-functionalized Fe3O4@C magnetic nanoparticles were obtained by grafting the sulfonic groups on the surface of Fe3O4@C nanoparticles to produce magnetically recyclable solid acid catalysts. The as-prepared products were characterized by X-ray diffraction and transmission electron microscopy. The catalytic performance of the as-prepared catalysts was examined through the condensation reaction of benzaldehyde and ethylene glycol. The results showed that the catalysts exhibited high catalytic activity with a conversion rate of 88.3% under mild conditions. Furthermore, catalysts with a magnetization saturation of 53.5 emu g(-1) at room temperature were easily separated from the reaction mixture by using a 0.2 T permanent magnet and were reused 8 times without any significant decrease in catalytic activity.