▎ 摘　　要

NOVELTY - Method for preparing assembly type catalytic filler involves adding fiber material, wetting agent, hydrogen peroxide solution and liquid nitrogen source to graphene oxide dispersion liquid under stirring condition, mixing evenly, carrying out hydrothermal reaction, and cooling to form assembled hydrogel. USE - Assembly-type catalytic filler used as a fixed bed catalyst for catalyzing the reduction reaction of arylnitro compounds (claimed). ADVANTAGE - The assembled catalytic filler has excellent catalytic reaction efficiency without the traditional modification means such as introducing active metal and the like, has good mechanical property and cycle stability. The preparation method is simple, raw materials are easy to obtain, the requirement on equipment is low, the condition is mild, the production cost is low. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for assembly-type catalytic filler prepared by the preparation method is a three-dimensional porous three-dimensional structure formed by self-assembly of fiber materials and nitrogen-doped porous graphene.