Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 138, Issue 2, Pages 480-484Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2009.03.015
Keywords
Zinc oxide; Nanorods; Surfactant; Solid-state synthesis; Gas sensors
Funding
- National Science Foundation of China [20861008, 20661003]
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Pure and Nd-doped ZnO nanorods were prepared by simple low-heating solid-state chemical reaction of zinc acetate dihydrate and sodium hydroxide in the presence of sodium dodecyl Sulfate (SDS) at room temperature. The as-prepared products were characterized by XRD, EDS, SEM and TEM. The gas-sensing characteristics of the pure and Nd-doped ZnO nanorods were investigated. The results indicated that the sensor based on 2 at% Nd-doped ZnO nanorods presented much higher sensitivity, better selectivity and shorter response-recovery time to 100 ppm ethanol vapor than the pure ZnO nanorods sensor. The promoting effect on gas-sensing properties of ZnO nanorods seems to result from the catalytic oxidation of ethanol vapor. (C) 2009 Elsevier B.V. All rights reserved.
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