Solvothermal synthesis of CeO-ZrO-MO (M = La, Y, Bi) mixed oxide and their soot oxidation activity.

CeO-ZrO-MO (M = La, Y, Bi) mixed oxide has been prepared by a solvothermal synthesis method. The physico-chemical properties of the mixed oxide have been studied by X-ray powder diffraction (XRD), Raman spectroscopy, BET, X-ray photoelectron spectroscopy (XPS), TEM and temperature-programmed reduction (TPR), and the catalytic activity for soot oxidation has been studied by thermogravimetry (TG). La, Y and Bi exhibit positive effects on lowering the oxidation temperature of the soot.