Imam Khambali1,2,*, Budhi Priyanto1,2, Retno Asih1, Malik Anjelh Baqiya1, Muhammad Mahyiddin Ramli3, Nurul Huda Osman4, Sarayut Tunmee5, Hideki Nakajima5, Triwikantoro1, Mochamad Zainuri1, Darminto1,*
Journal of Renewable Materials, Vol.11, No.4, pp. 1823-1833, 2023, DOI:10.32604/jrm.2023.025026
Abstract An rGO−like carbon compound has been synthesized from biomass, i.e., old coconut shell, by a carbonization
process followed by heating at 400°C for 5 h. The nitrogen doping was achieved by adding the urea (CH4N2O)
and stirring at 70°C for 14 h. The morphology and structure of the rGO-like carbon were investigated by electron
microscopies and Raman spectroscopy. The presence of C-N functional groups was analyzed by Fourier transform infrared and synchrotron X-ray photoemission spectroscopy, while the particle and the specific capacitance
were measured by particle sizer and cyclic voltammetry. The highest specific capacitance of 72.78 F/g is achieved
by… More >
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