Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (2): 188-194.DOI: 10.11944/j.issn.1000-0518.2019.02.180089

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Synthesis and Application of Water-Soluble Fe3O4 Magnetic Nano-catalyst

CHEN Hongyuna,YANG Fanghonga,LI Yupenga,HE Jiayua,CHE Mengqina,WANG Meichenb,CHENG Chuanjiea*()   

  1. aSchool of Chemistry and Chemical Engineering,Jiangxi Science & Technology Normal University,Nanchang 330013,China;
    bSchool of Information Engineering,Nanchang University,Nanchang 330031,China
  • Received:2018-03-29 Published:2019-02-01 Online:2019-01-31
  • Contact: CHENG Chuanjie
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21564004, No.21264008)

Abstract:

Fe3O4 magnetic nano particles(MNPs) with sulfonic acid groups on the surface were readily prepared via coupling reaction between 4-amino phenylsulfonic acid diazonium tetrafluoroborate and Fe3O4 nano particles. Transmission electron microscopy(TEM) images reveal that the average size of these acidic particles is about 20 nm. These acidic particles show good solubility in water, but they are insoluble in most of common organic solvents, allowing easy isolation and recycling of the particles by their magnetic property in catalytic reactions. In terms of application, when the acidic magnetic particles were used to catalyze esterification reactions between carboxylic acids and alcohols, moderate to high isolated yields(71%86%) of ester products were obtained. The optimized catalyst loading is 1.5%(mass fraction). Furthermore, 5-hydroxymethyl furfural(HMF) was also synthesized in a 32% yield from fructose utilizing the acidic magnetic particles as a catalyst.

Key words: magnetic nanoparticles, nano Fe3O4, nano catalyst, esterification, water-solubility