Enrichment of Oxygen Molecules Containing 17O, 18O on the Surface of CdO

The phenomenon of 17O, 18O enrichment in the surface layer of CdO was investigated by means of temperature-programmed desorption-ion-trap detector (TPD-ITD), quadrupole mass spectrometer(QMS), X-ray photoelectron spectroscopy (XPS), X-ray diffraction（XRD）etc.The results obtained showed that the Cd(OH)2-CdCO3 surface layer of CdO possesses the ability of selective inclusion of oxygen molecules containing 17O, 18O in air.