▎ 摘　　要

NOVELTY - Preparing multi-arm magnetic graphene oxide composite microsphere comprises covalent bonding based on GOFe3O4 and 4arm-PEG-NH2, and has super-paramagnetism and composite dendrimer structure. USE - The microsphere and cellulose are useful for immobilization of enzyme and degrading cellulosic materials (claimed). ADVANTAGE - The cellulose has high temperature resistance, high storage capacity, and high recyclability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing immobilized cellulase based on multi-arm magnetic graphene oxide composite microsphere