Preparation technology of large-particle cerium oxide

The invention provides a preparation technology of large-particle cerium oxide, and relates to the technical field of cerium oxide preparation. The cerous nitrate prepared by reaction of cerous carbonate and nitric acid is used as a precursor, the method for preparing the cerous nitrate is simple, the raw material cerous carbonate is directly used as a pH regulator, redundant impurities are not introduced, the precursor cerous nitrate is mixed with cetyltrimethylammonium bromide, and when the concentration of CTAB in a mixed solution system reaches the critical micelle concentration, the cerous nitrate is prepared. And the single CTAB molecules can be agglomerated together to obtain the micelle in a spherical form. The preparation method comprises the following steps of: ionizing CTAB (Cetyltrimethyl Ammonium Bromide) dissolved in water to form CTA < + > ions which can be electrostatically matched with crystal formation anions (CO3 < 2-> and OH ), forming a plurality of directionally-arranged positively-ch