The present invention provides an anti-aging
cerium-
zirconium composite oxide. The
cerium-
zirconium composite oxide has a specific surface area of 80 m<2> / g or more, a pore volume of 0.55-0.80 ml / g, an
oxygen storage capacity of 500-1200 [mu]mol O2 / g and two-pore group distributed apertures, wherein the
diameter of the first pore group is concentrated at 3-10 nm, and the
diameter of the second pore group is concentrated at 15-80 nm. The
cerium-
zirconium composite oxide provided by the invention has a significant anti-aging activity and a good low-temperature catalytic activity, and can be used for catalyzing hydrocarbons, carbon oxides and / or
nitrogen oxides in mobile source
exhaust gas. A preparation method of the cerium-zirconium composite
oxide, provided by the invention, does not use a surfactant, and reduces
sewage discharge, so the method is green and
environmentally friendly; an
ionic liquid and
anhydrous ethanol can be recovered by simple
distillation, so the cost is greatly reduced, and the method is particularly suitable for industrial production; and the composite
oxide with uniform element
crystal lattice
doping distribution and no phase separation is obtained, so the preparation method is of great significance to study mobile source
exhaust gas treatment purifiers containing the cerium-zirconium composite
oxide.