MoO2-modified carbon nanotablets prepared by assembly of a polyoxomolybdate precursor for enhanced microwave absorption properties

Abstract

The electromagnetic wave pollution, originating from various electronic devices, has attracted widespread attention and has brought serious threats to human life. For this situation, the high-efficiency electromagnetic wave absorption (EMA) materials are required. Herein, carbon material modified with molybdenum dioxide is designed and synthesized by carbonizing the Mo-precursor. The Mo oxide/carbide-modified carbon materials are obtained by changing the raw material ratio and carbonized temperatures. The optimal material (MO-2-750) is composed of MoO2 and carbon with uniform nanotablet-like shapes and has excellent impedance matching. The maximum reflection loss of MO-2-750 is about −59.9 dB at a thickness of 2.2 mm, which is nearly 6 times that of carbon material. The effective absorption bandwidth is in the range of 11.29–17.32 GHz. This MoO2-modified carbon material could serve as an EMA platform in the electromagnetic wave absorption fields.