Molten salt-directed synthesis of carbon nanotube/C3N4/manganese carbodiimide(MnNCN): Novel microwave absorbing materials

Abstract

Owing to their potential functional performance, metal-substituted carbodiimides of the form M(NCN)x have attracted the attention of scholars. However, the application of these new functional materials in microwave absorption (MA) has rarely been reported. In this study, carbon nanotube (CNT)/C3N4/MnNCN (CCM) was prepared via a facile molten salt strategy (MSS) to develop efficient microwave absorbing materials. The morphology, components, and MA properties of CCM were systematically investigated. The results show that synthesized CCM has an excellent MA performance. Specifically, the effective absorbing bandwidth (EAB) and optimal MA performance of CCM were 5.48 GHz (12.32–17.8 GHz) and −57.7 dB, respectively. The unique structure, special magnetic properties of MnNCN, and multiple loss mechanisms promote the MA properties of CCM. Therefore, this study explored the application of M(NCN)x in the field of MA for the first time and expanded the research on the MSS in the MA field.