Light hollow carbon cube wave-absorbing material and preparation method thereof

The invention belongs to the field of material preparation, and particularly relates to a light hollow carbon cube wave-absorbing material and a preparation method thereof. In order to solve the problems of impedance mismatching, non-adjustable electromagnetic wave absorption frequency band and the like of a pure carbon wave-absorbing material prepared by an existing method, the invention providesa preparation method of the light hollow carbon cubic wave-absorbing material on the basis of fully utilizing a hard template to construct a hollow structure. According to the method, Cu2O microspheres are selected as a hard template; in-situ growth, calcination, template removal and other processes are carried out to obtain a light hollow carbon cube; the shell thickness of the hollow carbon cube is regulated and controlled by regulating the coating thickness of a polydopamine precursor on the surface of Cu2O, so that the conductivity of the carbon material can be effectively regulated and controlled within a small