A fast renewable bamboo source is first adopted to synthesize carbon-based magnetic composites as efficient and sustainable microwave absorbers through a carbothermal in-situ growth process. The magnetic core-shell particles uniformly encapsulated in porous carbon skeleton can promote magnetic loss and graphitization of carbon shell. The gradient graphitization of graphitic shells and disordered framework is favorable for conductive loss and polarization relaxation. By controlling the magnetic content, the microstructure, magnetic property, graphitization and absorbing performance of the compo...
