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The yolk-shell Fe3O4@C nanocubes were successfully synthesized through carbothermic reduction process from carbon-coated α-Fe2O3 precursor. The results show that the yolk-shell Fe3O4@C nanocubes are uniformly coated with a thin carbon layer, and a clear cavity about 150 nm in width between Fe3O4 core and carbon shell are formed due to the volume shrinkage during the reduction treatment. The obtained...
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