Abstract
Flash joule heating (FJH) has been demonstrated to produce high-quality graphene. In this work, graphene (B-Gr) was successfully prepared from biowaste bagasse by FJH. The product was characterized by transmission electron microscopy, X-ray powder diffraction technique and Raman spectroscopy. When the filler loading of B-Gr was 15 wt.%, the minimum reflection loss reached 39.1 dB at 5.9 GHz with effective absorption bandwidth of 1.7 GHz at the thickness of 4 mm. The remarkable microwave absorption (MA) performance could be attributed to the excellent impedance matching. This work makes it possible to upgrade negative-value biowaste into high-value powder fillers for MA.
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