Abstract
SnO 2 doped with rare earth Sm, containing different amount of oxygen vacancies, was prepared by hydrogen reduction method, and characterized by means of X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The study of gas-sensing properties of the sample was carried out. The tested gas was n-C 6H 14, H 2, C 2H 5OH, C 6H 6 and CO, respectively. Experimental results showed that the specific surface area of sample increases with the amount of oxygen vacancies, and the gas-sensing properties of Sm/SnO 2 vary with the amount of oxygen vacancies, therefore, it is possible to improve gas-sensing properties of doped SnO 2 by controlling its oxygen vacancy.
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