CHARACTERIZATION OF CaO-CuO-CeO2 MIXED OXIDE SYNTHESIZED BY THE IMPREGNATION AND INVESTIGATION OF ITS REUSABILITY

CaO-CuO-CeO 2 mixed oxide was prepared by the impregnation method and used as the catalyst for the complete decomposition of phenol in the presence of hydrogen peroxide. The  CaO-CuO-CeO 2 mixed oxide were characterized by XRD, SEM, BET, H 2 -TPR and Raman spectroscopy. The results indicated that there were three CuO species in the mixed oxide: the finely dispersed CuO species on the surface of CeO 2 , the Ce 1-x-y Cu x Ca y O 2- d solid solution and the bulk CuO. Most of particles have clear morphology with relatively uniform size in the range of 30 - 50 nm and the BET surface area was 37.96 m 2 /g. After three times of use, the catalytic activity of CaO-CuO-CeO 2 mixed oxide was still relatively high and much higher than the mixed oxide CaO-CeO 2 and CuO-CeO 2 .