Molten salt-assisted synthesis of cotton-like dopamine-derived carbon/transition metal sulfide composites with effective microwave absorption

Abstract

This report proposes a preparation route for the molten salt (MS)-assisted synthesis of cotton-like C/transition metal sulfide (TMD) composites. By using the mussel-inspired method, carbon derived from dopamine (DA) can be well combined with the TMDs synthesized by molten salt synthesis (MSS). The morphologies and structures, electromagnetic (EM) properties and MA performances were systematically analyzed. The results show that a series of synthesized cotton-like C/TMD composites exhibit efficient MA performance and are superior to many reports in the microwave absorption (MA) field. The best MA performance of cotton-like C/TMD composites can reach −63.49 dB, and the best effective absorption band (EAB) is 5.92 GHz. This work proposes a universal MS-assisted synthesis method for synthesizing composites with excellent MA performance and precise structure, which expands the application of MSS in the MA field and provides a reference for the synthesis of MA composites using the MS method combined with other methods.