摘要
In this paper,the structure evolution of cerium cobaltohexanoate(Ce[Co(CN)6],Ce-Co Prussian blue analog(PBA))has been realized by solvent catalysis at room temperature.The hexagonal bipyramidal microcrystals of Ce-Co PBA can be gradually transformed into dendrites by different proportions of ethanol(EtOH)and water.At the same time,the porous dendrites CeO_(2)/Co@carbon nanotub(CNT)with oxygen-rich vacancies(OVs)can be obtained by annealing Ce-Co PBA at 700℃.The microstructure study shows that carbon nanotubes will be catalyzed after annealing at high temperature,and the cobalt metal particles encapsulated in carbon nanotubes will be anchored in the matrix,regulating the impedance matching and multi-polarization suppression of the material,and its unique structure,vacancies,and strong interface effect make the material exhibit excellent electromagnetic wave(EMW)absorption performance.When the matching thickness is 2.5 mm,the minimum reflection loss(RLmin)of the composite is-51.68 dB,and the effective absorption bandwidth(RL<-10 dB)is 7.76 GHz.These results show that the prepared CeO_(2)/Co@CNT composite has excellent EMW absorption properties.It is expected to be a candidate material for EMW absorption.
基金
supported by the National Natural Science Foundation of China(Nos.52377026 and 52301192)
the Natural Science Foundation of Shandong Province(Nos.ZR2019YQ24 and ZR2020QF084)
the Taishan Scholars and Young Experts Program of Shandong Province(No.tsqn202103057)
the Qingchuang Talents Induction Program of Shandong Higher Education Institution(Research and Innovation Team of Structural-Functional Polymer Composites)
the Special Financial of Shandong Province(Structural Design of High-efficiency Electromagnetic Wave-absorbing Composite Materials and Construction of Shandong Provincial Talent Teams).
作者简介
Jixi Zhou,contributed equally to this work;Xinmeng Huang,contributed equally to this work;Address correspondence to:Guanglei Wu,wuguanglei@qdu.edu.cn,wuguanglei@mail.xjtu.edu.cn;Address correspondence to:Zirui Jia,jiazirui@qdu.edu.cn。
