▎ 摘　　要

NOVELTY - Preparing catalyst hydrogel sphere comprises preparing chitosan solution, comprising adding chitosan into the acetic acid solution to obtain the chitosan solution, preparing sodium alginate glutaric dialdehyde solution, adding sodium alginate into ultra-light water, adding glutaric dialdehyde solution, obtaining the sodium alginate glutaric dialdehyde solution, preparing catalyst graphene the gelatin solution, adding gelatin and the catalyst graphene into ultra-light water, dissolving, heating the catalyst graphene gelatin solution, mixing the chitosan solution with the catalyst graphene dropping into the sodium alginate glutaric dialdehyde solution, forming, obtaining the hydrogel ball containing catalyst, the catalyst is Pr-CeO2 with cubic fluorite structure. USE - The hydrogel ball containing catalyst is useful in photo-catalytic treatment of organic pollutant, ADVANTAGE - The catalyst hydrogel sphere solves the problem that the existing catalyst has low degradation efficiency, narrow application pH range, not easy to be recycled, system anti-interference ability is bad; it can widen the suitable pH range, increase the anti-interference ability of the system, improves the absorption capability of the catalyst to the visible light and increases the recycling of the catalyst. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) hydrogel ball containing catalyst obtained by above method-containing hydrogel sphere;