Fast ultrasound assisted synthesis of chitosan-based magnetite nanocomposites as a modified electrode sensor

T. M. Freire, L. M.U. Dutra, D. C. Queiroz, N. M.P.S. Ricardo, K. Barreto, J. C. Denardin, Frederik R. Wurm, C. P. Sousa, A. N. Correia, P. De Lima-Neto, P. B.A. Fechine*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

33 Citations (Scopus)
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Abstract

Chitosan-based magnetite nanocomposites were synthesized using a versatile ultrasound assisted in situ method involving one quick step. This synthetic route approach results in the formation of spheroidal nanoparticles (Fe3O4) with average diameter between 10 and 24 nm, which were found to be superparamagnetic with saturation magnetization (Ms) ranges from 32-57 emu g-1, depending on the concentration. The incorporation of Fe3O4 into chitosan matrix was also confirmed by FTIR and TG techniques. This hybrid nanocomposite has the potential application as electrochemical sensors, since the electrochemical signal was excepitionally stable. In addition, the in situ strategy proposed in this work allowed us to synthesize the nanocomposite system in a short time, around 2 min of time-consuming, showing great potential to replace convencional methods. Herein, the procedure will permit a further diversity of applications into nanocomposite materials engineering.

Original languageEnglish
Pages (from-to)760-769
Number of pages10
JournalCarbohydrate polymers
Volume151
DOIs
Publication statusPublished - 20 Oct 2016
Externally publishedYes

Keywords

  • Chitosan
  • Magnetite
  • Nanocomposites
  • Superparamagnetic
  • Ultrasound

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