Sintesis Oksida Grafena Tereduksi (rGO) dari Arang Tempurung Kelapa (Cocos nucifera)

Ahmad Hidayat, Soni Setiadji, Eko Prabowo Hadisantoso

Abstract


Grafena merupakan satu lapis atom karbon yang memiliki hibridisasi sp2 membentuk struktur heksagonal dua dimensi. Grafena memiliki potensi yang sangat luas namun ketersediaannya masih terbatas. Penelitian ini bertujuan untuk mensintesis oksida grafena tereduksi (rGO) dari arang tempurung kelapa dengan menggunakan metode modifikasi Hummer. Modifikasi dilakukan dengan menghilangkan NaNO3. Sintesis dilakukan dengan ukuran partikel arang tempurung kelapa ~ 50 μm dan waktu oksidasi selama 5 hari. Analisis struktur rGO dilakukan dengan pengujian FTIR, UV-Vis dan difraksi sinar-X (XRD). Hasil pengujian FTIR menunjukkan adanya puncak pada panjang gelombang 1604,891 cm-1 dari ikatan C=C aromatik yang merupakan indikasi terbentuknya rGO. Hasil pengujian UV-Vis menunjukkan adanya serapan pada panjang gelombang 272 nm yang disebabkan oleh transisi π→π ⃰ dari ikatan C=C pada cincin aromatik. Pengujian XRD menghasilkan puncak difraktogram pada sudut 2θ ~ 24° yang khas untuk material rGO.

Keywords


rGO; modifikasi Hummer; arang tempurung kelapa; grafena; grafit.

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DOI: https://doi.org/10.15575/ak.v5i2.3810