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Sensing properties of MWCNTs layers electrodecorated with metal nanoparticles for detection of aromatic hydrocarbon compounds

Published online by Cambridge University Press:  23 January 2017

E. Dilonardo ,
M. Alvisi ,
R. Rossi ,
G. Cassano ,
F. Di Palo ,
G. Palazzo  and
M. Penza
E. Dilonardo*
Affiliation:
Department of Chemistry, Università degli Studi di Bari Aldo Moro, Bari, Italy. Department of Electrotechnics and Electronics (DEE), Politecnico di Bari, Bari, Italy.
M. Alvisi
Affiliation:
ENEA, - Brindisi Research Center, Brindisi, Italy
R. Rossi
Affiliation:
ENEA, - Brindisi Research Center, Brindisi, Italy
G. Cassano
Affiliation:
ENEA, - Brindisi Research Center, Brindisi, Italy
F. Di Palo
Affiliation:
Arpa Puglia, Bari, Italy.
G. Palazzo
Affiliation:
Department of Electrotechnics and Electronics (DEE), Politecnico di Bari, Bari, Italy.
M. Penza
Affiliation:
ENEA, - Brindisi Research Center, Brindisi, Italy
*
*Corresponding authors: Elena Dilonardo (elena.dilonardo@uniba.it).
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Abstract

An electrophoretic process is proposed to deposit electrochemically-preformed Au or Pd NPs, with controlled size, directly on MWCNTs-based chemiresistors to improve the detection of aromatic pollutants, compared to pristine ones.

The sensing properties of pristine and functionalized MWCNTs were evaluated at an operating temperature of 40°C towards various concentrations of one aromatic pollutant, belonging to the dangerous BTEX class of compounds, m-Xylene. The sensing performance was related to the metal used in the functionalization process. Metal-doped MWCNTs sensors exhibited a very high gas sensitivity to m-Xylene even at low (80 ppb) concentration at low operating temperature (40°C), good reversibility and repeatability, with the sensing properties controlled by the type of deposited metal catalyst.

The results indicate that Metal-modified MWCNT-based chemiresistive gas sensors has good potential in practical applications, due to its remarkable performance, low power consumption, and facile synthesized methods.

Keywords

sensorelectrochemical synthesiselectrodeposition
Type
Articles
Information
MRS Advances , Volume 2 , Issue 18: Processing and Manufacturing , 2017 , pp. 1009 - 1014
Copyright
Copyright © Materials Research Society 2017 

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References

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