Synthesis of n-Doped Reduced Graphene Oxide from Coconut Shell as Supercapacitors

Khambali, Imam; Ardiani, Irma Septi; Kurniawan, Ahmad; Triwikantoro, T.; Zainuri, Mochamad; Darminto, Darminto

doi:10.4028/www.scientific.net/msf.966.437

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…Anyway, the use of urea as a nitrogen source was proven to be more effective in inserting N atoms into the hexagonal C bonding network on the rGO structure. Compared to our previous samples, where N 2 gas (bubbling process) and NH 4 OH were used as the source of N atoms, the samples with the best specific capacitance were 20.67 and 37.33 F/g, respectively [32]. On the basis of these results, it is clear that the N atom derived from the urea molecule is more capable of forming bonds with the C atom in rGO than those from N 2 and NH 4 OH.…”

Section: Resultsmentioning

confidence: 56%

N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

Khambali¹,

Priyanto²,

Asih³

et al. 2023

Journal of Renewable Materials

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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 (CH 4 N 2 O) 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 the sample with 20% urea, having the smallest particles size and the largest surface area. The corresponding sample has shown to be constituted by the appropriate amount of C-N pyrrolic and pyridinic defects.

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Section: Resultsmentioning

confidence: 56%

N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

Khambali¹,

Priyanto²,

Asih³

et al. 2023

Journal of Renewable Materials

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“…Carbon is one of the materials that have the potential to be used for various purposes, including in the fields of the utilization of electronic components [3], optics [4], mechanics [5], as an absorbent (adsorbent) [6], aircraft brakes, batteries, fuel cell electrodes [7], and supercapacitors. Carbon has three main structures or allotropes of carbon: graphite, fullerenes, and diamond [8].…”

mentioning

confidence: 99%

Analysis of Phase and Energy Band Gap Width of Corncob Carbon-PEG 4000

Mas’udah

Darminto

2022

JPSE (J. Phys. Sci. Eng.)

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This study aims to identify and analyze the band gap width of the carbon phase produced from corncobs mixed with PEG-4000 to see the surface area of the corncob carbon phase. First, the characterization test was carried out using Scanning Electron Microscope Energy-Dispersive X-ray (SEM-EDX) spectroscopy to determine the morphology and Ultraviolet-Visible (UV-Vis) spectroscopy to determine the band gap width of corncob carbon. Then, adding Polyethylene Glycol (PEG) 4000 at a specific concentration to develop the potential of corncob carbon. Finally, the corncob-PEG 4000 carbon reduction process was sifted through and tested by UV-Vis spectroscopy, and the energy gap value was 0.954 eV.

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“…The peak of RGO refers to the diffraction pattern where this phase is included in the carbon-graphite type which has a hexagonal crystal system with a space group of R-3m. Corncobs fine powder heating to a temperature of 100, 200, 250 ºC with a holding time of one hour has an interesting characteristic, namely, it has an amorphous peak at an angle of 15º-30º where the peak formed at an angle of 15º is a graphene oxide phase [13], while the peak which is formed in the sample is at an angular position of the range 20º-25º which is RGO [14].…”

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confidence: 99%

A Study on Phase and Microstructure of Reduced Graphene Oxide Prepared by Heating Corncobs

Mas’udah

Taufiq

Sunaryono

2020

JPSE

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The purpose of this study was to find out reduced graphene oxide (RGO) phases by identifying the system, elemental system, and microstructure of corncobs. Characterization was carried out by XRD and SEM-EDX spectroscopy. The temperatures used in this work are 100, 200, and 250 ºC with a holding time of 1 hour. XRD analysis shows that the RGO phase is formed by the structure of the aromatic layer arrangement (graphite 002), and the widening comes from small-dimensional crystallites perpendicular to the aromatic layer (graphite 120). The elements contained in the three samples have a dominant proportion in the elements carbon and oxygen. From the SEM results obtained the morphology of corncobs powder that looks like sheets. The reduced graphene oxide phase is formed from the process of reducing corncobs powder.

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Synthesis of n-Doped Reduced Graphene Oxide from Coconut Shell as Supercapacitors

Cited by 3 publications

References 20 publications

N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

N-Doped rGO-Like Carbon Prepared from Coconut Shell: Structure and Specific Capacitance

Analysis of Phase and Energy Band Gap Width of Corncob Carbon-PEG 4000

A Study on Phase and Microstructure of Reduced Graphene Oxide Prepared by Heating Corncobs

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