Electrochemically growth of Pd doped ZnO nanorods on QCM for room temperature VOC sensors

Pristine and various palladium (Pd) doped ZnO nanorods have been synthesized on the quartz crystal microbalance (QCM) for volatile organic compound (VOCs) sensors at room temperature. The doping concentrations were varied from 0mol% to 2.5mol% by using electrochemical deposition method. The diameter...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2016-01, Vol.222, p.280-289
Main Authors: Öztürk, Sadullah, Kösemen, Arif, Kösemen, Zühal Alpaslan, Kılınç, Necmettin, Öztürk, Zafer Ziya, Penza, Michele
Format: Article
Language:English
Subjects:
Acetone
Chloroform
Doping
Electrochemical deposition
Gas sensor
Microbalances
Nanorods
Palladium
Pd doping
QCM
Sensors
VOCs
Volatile organic compounds
ZnO
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Summary:Pristine and various palladium (Pd) doped ZnO nanorods have been synthesized on the quartz crystal microbalance (QCM) for volatile organic compound (VOCs) sensors at room temperature. The doping concentrations were varied from 0mol% to 2.5mol% by using electrochemical deposition method. The diameters of the fabricated nanorods were in the range of 100–200nm, and were increased with Pd doping. The tested VOCs included alcohols (ethanol, methanol, isopropyl), ester (ethyl acetate), aromatic (toluene, xylene), ketone (acetone) and chloroform in the different concentrations. The results indicated that the sensitivity of the sensing materials was enhanced with the increasing Pd doping concentrations except for the acetone and chloroform. The undoped ZnO nanorod sensor showed higher sensor response against to acetone and chloroform while exposing high concentration of two analytes due to the absorbing/adsorbing mechanism. All undoped and Pd doped nanorods sensors showed the highest sensitivity to xylene.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2015.08.083