Pelangi Eka Yuwita, Kusuma Wardhani Mas'udah, Sunaryono, Ahmad Taufiq
Many studies have investigated a carbon phase in corncobs. This paper reports on the characteristics of structures of a carbon phase in corncob powder without heating treatment and corncob powder with a heating temperature of 400 °C for 5 hours. The X-RD data analysis showed that the phase formed in the corncob powder sample was an amorphous structure indicating the formation of the Carbon Graphite 3R phase, which had a crystal system and a rhombohedral R-3m space group. Through the X-ray diffraction pattern, corncob powder heated at 400 °C for 5 hours also indicates the formation of the Carbon Graphite 3R phase, which has a crystal system and a rhombohedral R-3m space group. In addition, impurities are also found in materials that show the formation of the O2 phase, which has a crystal system and a Pm-3n cubic space group. EDX test results also documented the element of carbon with the highest carbon composition of 71.11%. The carbon phase formed after the carbonization process has an amorphous carbon structure. Through SEM observation, the morphology of corncob powder was observed in the form of sheet-like particle aggregation with an average size of 20 µm. Meanwhile, the corncob charcoal powder, which was heated at 400 °C for 5 hours, showed a smaller aggregation with an average grain size of 0.25 µm. The results of FTIR data analysis portrayed that there was a strain of C=C bond in corncob powder in the wavenumber position of 2517.1 cm-1, which represented the formation of benzene structure, which is a characteristic of carbon structure in graphite and graphene. However, this bonding strain did not appear in samples that were given a heating treatment up to 400 °C for 5 hours. © 2020 Author(s).
Mechanical Engineering Department, Faculty of Science and Technology, Universitas Nahdlatul Ulama Sunan Giri, Bojonegoro, 62111, Indonesia; Faculty of Science and Technology University of Pesantren Tinggi Darul Ulum (UNIPDU), PP. Darul Ulum, Jombang, 61481, Indonesia; Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia; Center of Advanced Materials for Renewable Energy (CAMRY), Universitas Negeri Malang, Jl. Semarang No. 5, Malang, 65145, Indonesia
