Characteristics of Graphene Like Material Synthesized from Commercial Activated Carbon of Coconut Shell Using a Modified Hummers Methods

Commercial activated carbon of coconut shell (CS) was used as the raw material for synthesis graphene like using modified Hummers method. The structure CS is amorphous and contains natural minerals such silica, potassium, magnesium calcium impurities. Prior to use, we carried out a thermal pre-treatment process (heating) on in order remove Pieces were grounded size 200 mesh (CS1), then heated at temperature 850°C with heating rate 5°C/min 2 hours furnace. obtained referred CS2. A precursor CS1 or CS2 mixed sulfuric acid solution until homogen glass beaker that placed an ice bath. Then, potassium permanganate powder slowly added into while stirring. After that, distilled water H O stop oxidation process. produced precipitate passed through purification, ultrasonication drying processes. synthesized from H-CS1 one H-CS2. characterization results FTIR, Raman, XRD Uv-Vis show materials have charachteristic reduced oxide (rGO) ID/IG = 1.0056 ratio 0.9476 This result indicates has lower impurity defect H-CS2