Excellent Electromagnetic Wave Absorbing Performance of Carbon Nano Structure Synthesized from Oryza Sativa Stems

Abstract

Currently, electromagnetic threat increased duo to interaction of electromagnetic wave with biological objects as a result of electromagnetic pollution of the environment. This is caused by different sources, like local wireless networking, extensive electronic device in households and public spaces, exhaustive consumption of electromagnetic filed in medicine and biological chemistry, and technologies. electromagnetic pollution not only effect the electronic device but also human organs like heart and biological system hence more attention are paid to develop such materials which are able to absorb electromagnetic wave. The carbon-based nano structure is good candidate because of its excellent dielectric properties high surface area and hence shows better electromagnetic waveabsorbing performance. The synthesis of Carbon Nano Structure obtained from plant-based precursors has become one of the newest approaches in the field of electromagnetic waveabsorbingabsorption due to its economical, immense availability and sustainability.Waste obtained from agriculture i.e., stem of rice crop was used as source of carbon to obtained carbon nano fibers (CNFs) over in inert atmosphere of Hydrogen gas. Acid treated CNFs were characterized using XRD, FEG-SEM, EDAX, and Raman Spectroscopy. The range of diameter and length of CNFs obtained from stem of rice crop are 100-200nm, 100-800nm, respectively. CNFs/epoxy composite with 9 wt. % and 2.4 mm thickness, shows an optimal Reflection loss (RL) value of -13.75 dB at 9.78 GHz. The effective absorption (RL ≤ -10 dB) has a bandwidth 8.41-11.88 GHz.