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2008-09-07 - Article/Dans un journal avec peer-review - Anglais - 8 page(s)

Llobet E., Espinosa E.H., Sotter E., Ionescu R., Vilanova X., Torres J., Felten Alexandre, Pireaux Jean-Jacques, Ke Xiaoxing, Van Tendeloo Gustaaf, Renaux F., Paint Y., Hecq Michel, Bittencourt Carla , "Carbon nanotube TiO2 hybrid filmssensors for detecting traces of O2" in Nanotechnology, 19, 37, 375501

  • Edition : Institute of Physics
  • Codes CREF : Chimie des solides (DI1316), Physique des plasmas (DI1233)
  • Unités de recherche UMONS : Chimie des interactions plasma-surface (S882)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
Texte intégral :

Abstract(s) :

(Anglais) Hybrid titania films have been prepared using an adapted sol–gel method for obtaining well-dispersed hydrogen plasma-treated multiwall carbon nanotubes in either pure titania or Nb-doped titania. The drop-coating method has been used to fabricate resistive oxygen sensors based on titania or on titania and carbon nanotube hybrids. Morphology and composition studies have revealed that the dispersion of low amounts of carbon nanotubes within the titania matrix does not significantly alter its crystallization behaviour. The gas sensitivity studies performed on the different samples have shown that the hybrid layers based on titania and carbon nanotubes possess an unprecedented responsiveness towards oxygen (i.e. more than four times higher than that shown by optimized Nb-doped TiO2 films). Furthermore, hybrid sensors containing carbon nanotubes respond at significantly lower operating temperatures than their non-hybrid counterparts. These new hybrid sensors show a strong potential for monitoring traces of oxygen (i.e. =10 ppm) in a flow of CO2, which is of interest for the beverage industry.

Notes :
  • (Anglais) Lecture en ligne: http://iopscience.iop.org/0957-4484/19/37/375501/pdf/nano8_37_375501.pdf
Identifiants :
  • DOI : 10.1088/0957-4484/19/37/375501