Facile synthesis of graphite-like carbon nitride/zinc oxide heterojunction for microwave absorption

Development of a thinner, wideband electromagnetic absorbing material that aims to address the growing electromagnetic pollution has becoming a hot topic. Herein, a heterojunction material consisting with 2 -dimensional g-C3N4 and hierarchical flower shaped ZnO has been produced by a simple method, which exhibits the superior dielectric response ability. In details, the formed heterojunction with crossed energy structure benefits to the conductivity loss ability. Moreover, the as-prepared g-C3N4/ZnO with controlled interfaces possess the desirable interfacial polarization relaxation behavior, which may additional con-tribution for the dielectric loss. Owing to the improved conductive loss an interface polarization, the ulti-mately sample has a broad band EM absorption ability, with an effective absorption region of 5.3 GHz under a thin matched thickness of 1.5 mm. The method for designing of heterojunction-based material can be desirable candidate for the high-performance EM absorber.(c) 2022 Published by Elsevier B.V.