期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 191, 期 -, 页码 45-52出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.09.002
关键词
SnO2; Hydrothermal treatment; Zn-doped; Gas sensor; Ethanol
资金
- National Nature Science Foundation of China [61006055, 61074172, 61134010]
- Program for Chang Jiang Scholars and Innovative Research Team in University [IRT1017]
- 863 High Technology Project [2013AA030902]
A one-step hydrothermal route was used to synthesize undoped and Zn-doped SnO2 hierarchical architectures. The morphologies and structures of the as-prepared samples were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscopy (FESEM), energy-dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). The results clearly revealed that the as-prepared SnO2 hierarchical architectures were composed of many 2 dimensional (2D) nanosheets with the thickness of about 30 nm. The gas sensing properties of the as-prepared undoped and Zn-doped SnO2 samples were tested toward various gases. The sensor based on S3 (Zn2+/Sn4+ = 0.056) showed excellent selectivity toward ethanol at the operating temperature 213 degrees C, giving a response of about 14.4 to 100 ppm, which was about 3.2 times higher than that of sensor based on pure SnO2. (C) 2013 Elsevier B.V. All rights reserved.
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