▎ 摘　　要

NOVELTY - Preparing microwave absorbing material comprises preparing graphite oxide using improved Hummers method, mixing graphene oxide solution and cerium nitrate hexahydrate in 1:25 ratio, adjusting pH to 10, generating nano cerium oxide while reducing graphene oxide using one-step hydrothermal method to obtain microwave absorbing material, where microwave absorbing material: has reduced graphite oxide, which is uniformly loaded on surface of the nano-scale cerium oxide particles, separated from each other by adjacent scales; is layered sandwich structure to improve microwave absorption properties. USE - The method is useful for preparing microwave absorbing material (claimed). ADVANTAGE - The absorbing material: has high absorption strength and band. DETAILED DESCRIPTION - Preparing microwave absorbing material comprises preparing graphite oxide using improved Hummers method, mixing graphene oxide solution and cerium nitrate hexahydrate in 1:25 ratio, adjusting pH to 10, generating nano cerium oxide while reducing graphene oxide using one-step hydrothermal method to obtain microwave absorbing material, where microwave absorbing material: has reduced graphite oxide, which is uniformly loaded on surface of the nano-scale cerium oxide particles, separated from each other by adjacent scales; is layered sandwich structure, which helps to improve microwave absorption properties. The average size of cerium oxide nanoparticles is 15 nm and has prominent quantum size effect and excellent oxygen vacancies effect; has reduced graphene oxide and cerium oxide nanoparticles in 1:10 weight ratio; electromagnetic wave absorption more than 90% when material has 1.5-4 mm thickness of the coating and frequency of 4.3-17 GHz at the reflection loss is from -32 to -10 dB.