Preparation and characterization of chitosan-grafted multiwalled carbon nanotubes and their electrochemical properties

Zigang Wu, Wei Feng, Yiyu Feng, Qiang Liu, Xinhua Xu, Tohru Sekino, Akihiko Fujii, Masanori Ozaki

Research output: Contribution to journalArticlepeer-review

167 Citations (Scopus)

Abstract

A chitosan (CS)-grafted multiwalled carbon nanotubes (MWCNT) composite (CS-MWCNT) was prepared via covalently grafting a biocompatible polymer CS onto the surfaces of MWCNT and was characterized by Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible spectroscopy (UV-vis), and transmission electron microscopy (TEM). The interaction between MWCNT and CS was investigated and explained according to the FTIR and UV-vis results. More evidence for the presence of the CS-MWCNT was confirmed by TEM images. In the TEM images, a core-shell structure with nanotubes in the center and a CS layer lying around them was observed. The electrochemical properties of the CS-MWCNT were characterized by an electrodeposition method that involves depositing it on a Au electrode. The porous microstructure of the CS-MWCNT modified electrode was observed by scanning electron microscopy. The excellent electrocatalytic ability of the CS-MWCNT modified electrode towards hydrogen peroxide is applicable to the development of oxidase-based amperometric biosensors.

Original languageEnglish
Pages (from-to)1212-1218
Number of pages7
JournalCarbon
Volume45
Issue number6
DOIs
Publication statusPublished - 2007 May

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)

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