期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 222, 期 -, 页码 280-289出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.08.083
关键词
Gas sensor; ZnO; Nanorods; Electrochemical deposition; Pd doping; VOCs; QCM
资金
- Scientific and Technological Research Council of Turkey (TUBITAK) [113F403, 111M261]
- COST Action EuNetAir - European Network on New Sensing Technologies for Air-Pollution Control and Environmental Sustainability [TD1105, STSM-TD1105-16434]
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 0 mol% to 2.5 mol% 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. (C) 2015 Elsevier B.V. All rights reserved.
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