Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 234, Issue -, Pages 130-136Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.04.042
Keywords
Indium oxide and tin oxide composites; Gas sensor; Hydrothermal; Ethanol
Funding
- National Nature Science Foundation of China [61374218, 61134010, 61327804]
- Program for Chang Jiang Scholars and Innovative Research Team in University [IRT13018]
- National High-Tech Research and Development Program of China (863 Program) [2013AA030902, 2014AA06A505]
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The In-Sn oxides composites made up of nanoparticles were successfully synthesized by an environment friendly one-step hydrothermal approach. The structures and morphologies of the composites were investigated by different kinds of techniques, including X-ray diffraction, field-emission electron scanning microscopy, transmission electron microscopy, electrochemical workstation and H-2-TPR technique. Their gas sensing performances of In-Sn oxides composites toward ethanol were investigated using a static system and possible gas-sensing mechanism were investigated. The response (R-g/R-g) of In-Sn oxides composites to 100 ppm ethanol (C2H5OH) was 59.6, which was 7.9 times higher than that of tin oxides at 200 degrees C. The enhanced response to ethanol can be attributed to the change of charge carrier concentration of the nanocomposites and the variation of oxygen adsorption due to the formation of abundant heterojunctions. (C) 2016 Published by Elsevier B.V.
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