Mechanical Exfoliation of Reduced Graphene Oxide From Old Coconut Shell as Radar Absorber in X-Band

Abstract:

The purpose of this study is to determine the effect of heating temperature and the chemical exfoliation process on the reflection loss of r-GO synthesized from coconut shell. The heating process is carried out at temperature of 400°C and 700°C. The chemical exfoliation process is carried out by adding 1M H₂SO₄ solution in a ratio of 1: 1, 1: 5, and 1:10. Then, the process of washing is done using an ultrasonic cleaner. The XRD pattern indicates that coconut shell charcoal has formed the r-GO phase. In the chemical exfoliation process with the addition of 1M H₂SO₄ solution in a ratio of 1: 10 at a temperature of 400°C, it shows that the maximum reflection loss is -7.186 dB at 10.48 GHz with an electrical conductivity of 1.075 x 10^-3 S/cm.

• Periodical: Materials Science Forum (Volume 966)
• Pages: 25-29
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.966.25
• Online since: August 2019
• Authors: Affandi Faisal Kurniawan*, Mohammad Syaiful Anwar, Khoirotun Nadiyyah, Mashuri Mashuri, Triwikantoro Triwikantoro, Darminto Darminto
• Keywords: Chemical Exfoliation, Old Coconut Shell, Radar Absorber, Reduced Graphene Oxide (rGO), Reflection Loss

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