Photo-catalytic properties of doped or substituted polyaniline-coated Fe3O4 nanoparticles

Fan Zhang, Weijie Song, Zongshan Zhao, Yang Cheng

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5 Scopus citations


Abstract: In this work, doped and substituted polyaniline (PANI)-coated Fe3O4 nanoparticles were synthesized. The diameter of Fe3O4 core was ~430 nm, and the thickness of PANI shell was ~20 nm. Their photo-catalytic properties for methyl orange were investigated under natural light illumination. The photo-catalytic activity sequence of three doped PANI/Fe3O4 nanoparticles is as follows: iodine doping > without doping > graphite powder doping. This should be due to the difference of structure, conductivity, and band gap resulting from the dopants. The photo-catalytic activity of five substituted PANI/Fe3O4 nanoparticles followed the order of poly(1,2-diaminobenzene) > poly(o-toluidine) > poly(1,3-diaminobenzene) > PANI > polydiphenylamine. The effects of steric hindrance, activated ability, and conjugation of the substituents on the photo-catalytic properties were discussed. The ESR results suggested that O2 and H2O2 dissolved in the solutions were important factors on the photo-degradation, and the ·OH generated via h+-mediated pathway was the key oxidizing substance.

Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish (US)
Article number2666
JournalJournal of Nanoparticle Research
Issue number10
StatePublished - Oct 2014

Bibliographical note

Publisher Copyright:
© 2014, Springer Science+Business Media Dordrecht.


  • Core/shell
  • Dopant
  • Magnetic nanoparticles
  • Photo-catalytic activity
  • Substituent


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