Carbon nanotube TiO2 hybrid filmssensors for detecting traces of O2

[en] 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.

Disciplines :

Chemistry
Physics

Author, co-author :

Llobet, E.

Espinosa, E.H.

Sotter, E.

Ionescu, R.

Vilanova, X.

Torres, J.

Felten, Alexandre

Pireaux, Jean-Jacques

Ke, Xiaoxing

Van Tendeloo, Gustaaf

More authors (4 more)

Language :

English

Title :

Carbon nanotube TiO2 hybrid filmssensors for detecting traces of O2

Publication date :

07 September 2008

Journal title :

Nanotechnology

ISSN :

0957-4484

Publisher :

Institute of Physics Publishing, United Kingdom

Volume :

Issue :

Pages :

375501

Peer reviewed :

Peer Reviewed verified by ORBi

Research unit :

S882 - Chimie des Interactions Plasma-Surface

Research institute :

R400 - Institut de Recherche en Science et Ingénierie des Matériaux

Commentary :

Lecture en ligne: http://iopscience.iop.org/0957-4484/19/37/375501/pdf/nano8_37_375501.pdf

Available on ORBi UMONS :

since 07 October 2010

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