Method for preparing cyclohexenone through high-selectivity oxidation of cyclohexene by using rare-earth-based perovskite

The invention discloses a method for preparing cyclohexenone through high-selectivity oxidation of cyclohexene by using rare-earth-based perovskite, relates to the technical field of preparation of cyclohexenone through oxidation of cyclohexene, and aims to solve the problems that an existing method is not environment-friendly enough or reaction conditions are not mild enough or reaction time is relatively long. The method comprises the following steps: adding cyclohexene, a rare-earth-based perovskite catalyst and a liquid-phase reaction medium into a light reaction tube, heating the obtained mixture to 60-80 DEG C, keeping the temperature, intermittently introducing oxygen as an oxidant, and fully reacting under the conditions of illumination and stirring to obtain a product; the method is simple and convenient to operate, catalytic oxidation can be completed within a short time under the mild reaction conditions of low temperature and no need of pressurization, the reaction process is green and mild, the c