期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 173, 期 -, 页码 127-132出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.06.045
关键词
Nanocrystallites; Mechanochemical reaction; Tin oxide; Doping; Sensing property
A series of Cd-doped SnO2 nanocrystallites have been successfully synthesized by mechanochemical reaction. The as-synthesized samples were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and X-ray photoelectron spectroscopy (XPS). The effect of Cd-doped amount on the crystalline structure, crystallite sizes, lattice parameter, surface morphology and elements chemical state of the SnO2 nanocrystallites has been discussed. The sensing property of the Cd-doped SnO2 nanocrystallites have enhanced evidently compared with that of the SnO2. The 10 wt% Cd-doped SnO2 based sensor shows an excellent sensing performance, such as high response (276.9 for 1000 ppm C2H5OH), a rapid response time (within 5s for 90% response and recovery times) and high selectivity to ethanol (the selective coefficient K-ethanol/butane achieves 37). (C) 2012 Elsevier B.V. All rights reserved.
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