Synthesis of reduced graphene oxide from oil palm empty fruit bunches using matoa leaf extract
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Full Text |
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Author |
Muhammad Said, Nadia Lestari, Maria Ulfa, Addy Rachmat, Desnelli and Muhammad Faizal
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e-ISSN |
1819-6608 |
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On Pages
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471-478
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Volume No. |
18
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Issue No. |
05
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Issue Date |
April 05, 2023
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DOI |
https://doi.org/10.59018/032367
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Keywords |
OPEFB, reduced graphene oxide, hummer, methylene blue, adsorption.
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Abstract
Reduced graphene oxide is a compound produced by removing oxygen-containing functional groups from graphene oxide. It was synthesized from oil palm empty fruit bunches because of their abundance and carbon elements to obtain an efficient adsorbent. Furthermore, the synthesis was conducted by using the Hummer method, and graphene oxide was reduced by matoa leaf extract. Characterization analysis with XRD reported an angle 2θ peak of 24.4º with a d-spacing value of 0.365 nm, while FTIR showed the O–H, C N, C=C, and C–H functional groups with lower intensities than GO. Characterization by Raman spectroscopy reported a D peak at 1381 cm–1, G at 1592 cm–1, and 2D at 2685 cm–1 with a defect intensity ratio compared to the graphite of 0.93. Meanwhile, the synthesized reduced graphene oxide was applied as an adsorbent to adsorb methylene blue. The concentration of the adsorbent showed the optimum conditions for the adsorption of methylene blue at the optimum concentration of 50 mg/L, the optimum time of 45 minutes, and the optimum adsorbent mass of 25 mg for 36.95 mg/L, 42.40 mg/L, and 49.856 mg/L, respectively. The reduced graphene oxide adsorption isotherm followed the Langmuir model with a correlation coefficient, maximum adsorption capacity, and a KL value of 0.9998, 54.945 mg/g, and 0.587 L/mg.
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