▎ 摘　　要

Hierarchical structures of grapheneCoFe(2)O(4)@SiO2@TiO2 nanosheets were successfully synthesized by combining the versatile sal-gel process with a hydrothermal reaction. Scanning electron microscopy and transmission electron microscopy observations display that the TiO2 nanosheets are mostly grown upright on the top of graphene@CoFe2O4@SiO2 support with a random orientation. When its microwave absorbing properties were investigated, the results show that the maximum reflection loss of the composites is up to -62.8 dB at 6.24 GHz with a thickness of 4.9 mm, and the RI, value below -10 dB could be obtained in the whole frequency range with the sample thickness varying from 2.0 to 6.0 mm. The excellent microwave absorption properties of graphene@CoFe2O4@SiO2@TiO2 nanosheets can be used as an attractive candidate for new type of microwave absorption materials. (C) 2015 Elsevier B.V. All rights reserved.