期刊
CERAMICS INTERNATIONAL
卷 41, 期 6, 页码 7329-7336出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.02.033
关键词
In/Pd co-doping; SnO2; Microspheres; Formaldehyde sensor
资金
- National Natural Science Foundation of China [61274068, 51303061]
- Chinese National Programs for High Technology Research and Development [2013AA030902]
- Project of Science and Technology Development Plan of Jilin Province [20120324, 20130206021GX, 20140204056GX]
- Project of Science and Technology Plan of Changchun City [13KG49]
In/Pd co-doped SnO2, Pd-doped SnO2, In-doped SnO2 and pure SnO2 microspheres with a diameter of 500-600 nm were prepared by the one-pot hydrothermal method. Their structures and morphological characteristics were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM). Their formaldehyde (HCHO) sensing properties were investigated in detail.. Compared with the In-doped SnO2, Pd-doped SnO2 and pure SnO2 microspheres sensors, the In/Pd SnO2 microspheres sensor exhibited excellent gas-sensing properties to HCHO gas and the operating temperature was relatively low. At the optimal operating temperature of 160 degrees C, the response of the sensor based on In/Pd SnO2 microspheres to 100 ppm HCHO was 24.6 and the detectable HCHO minimum was effectively reduced to 5 ppm. In addition, due to In and Pd co-doping, the response and recovery time of the sensors to 100 ppm HCHO gas were diminished to 3 s and 6 s, respectively. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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