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Hierarchical structures of graphene@CoFe2O4@SiO2@TiO2 nanosheets were successfully synthesized by combining the versatile sol–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...
A novel sandwich-structured composites of graphene@Ni@C have been successfully synthesized via a facile one-pot method by using dopamine as reducing agent and carbon source. TEM and SEM images reveal that the average diameter of Ni particles ranges from 20 to 50nm and these Ni particles anchored on grephene sheets are completely covered by N-doped carbon coatings. The investigation of the microwave...
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