Synthesis and sensoric response of ZnO decorated carbon nanotubes

Jayaprakash Khanderi, Rudolf C. Hoffmann, Aleksander Gurlo, Jörg J. Schneider

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

ZnO nanoparticles of size 2-10 nm were generated in situ from the single source precursor [2-(methoxyimino)propanoato]zinc(ii), ([CH 3ONCCH3COO]2Zn·2H2O) onto multiwalled carbon nanotubes (MWCNTs) at low temperature (150 °C). The degree of ZnO coverage on the MWCNTs can be tuned and is dependent upon the ZnO precursor concentration. A plausible growth mechanism based on surface saturation of as-deposited precursor on the MWCNTs has been proposed. The X-ray diffraction (XRD) pattern and transmission electron microscopy (TEM) indicate the nano-crystalline nature of the ZnO particles. Scanning electron microscopy (SEM) and TEM investigations of the ZnO deposition revealed a dense and homogeneous deposition along the complete periphery of the MWCNT. The ZnO/MWCNT nanocomposite hybrid materials were further electronically characterized by micro-Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), ultraviolet-visible spectroscopy (UV-Vis) as well as room temperature photoluminescence (PL). The nanostructured ZnO/MWCNT composite shows a better sensing performance when compared to bare MWCNTs in the detection of low CO levels (20-200 ppm).

Original languageEnglish (US)
Pages (from-to)5039-5046
Number of pages8
JournalJournal of Materials Chemistry
Volume19
Issue number28
DOIs
StatePublished - Jul 28 2009

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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