▎ 摘　　要

This paper reported a novel ternary nanocomposite consisting of reduced graphene oxide, carbonyl iron and polyvinyl pyrrolidone through a facile one-pot fabrication approach. The generation of ternary nanocomposite and its synergistic microwave absorbing properties were confirmed by various characterization methods and theoretical calculations. Attributing to the combination of three components with different futures, as-prepared ternary nanocomposite possesses excellent microwave absorbing properties including an ultra-wide low reflection (reflection loss < -10 dB) bandwidth (12.52 GHz, from 5.48 to 18 GHz) at the thickness of 2.8 mm, with the minimum value of -41.76 dB at 10 GHz. It is believed that such ternary nanocomposite has a significant potential in microwave absorbing applications.