Enhanced capacitance properties of nitrogen doped reduced graphene oxide obtained by simultaneous reduction and nitrogen doping

Bharathidasan, P.; Idris, Mustapha Balarabe; Kim, Dong-Won; Sivakkumar, S. R.; Devaraj, S.

doi:10.1016/j.flatc.2018.10.001

Cited by 40 publications

(16 citation statements)

References 32 publications

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“…The ratio between the band intensities (I D /I G ) increased as the pyrolysis temperature increases, which represents the transformation of a disordered structure into an ordered one (Rybarczyk, et al, 2019). Figure 5c shows how the spectrum of sample S700-6 was deconvolved in four peaks and the wide 2D and D+G bands around the 2800 cm -1 suggesting the presence of many graphene layers with edges, defects, and sp 2 regions (Prías, et al, 2016, Johra, et al, 2014Bharathidasan, et al, 2018).…”

Section: Resultsmentioning

confidence: 98%

Pyrolysis system to obtain carbonaceous material from rice husk used as a precursor

Castro-Ladino

Vacca-Casanova

Cuy-Hoyos

2020

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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We present the development and validation of a pyrolysis system with a controlled nitrogen atmosphere for the production of carbonaceous materials from biomass elements. Our objective was to use rice husk as a precursor to produce carbonaceous material and explore its application in different technological fields. In Colombia, over 800.000 tons of rice are produced every six months by the leading producing regions such as the Orinoquia region and the provinces of Tolima and Huila, among others. This system provides the opportunity to use agro-industrial waste such as rice husk, an environmental contaminator, and convert it into a useful and value-added material for the development of science and technology in emerging technological fields. Analyses performed using electron scanning microscopy (SEM) have shown that the synthesized material is a porous carbonaceous substance composed of irregular fibers with a hollow internal structure between 5 and 30 μm in size. The Raman spectra show a vibrational response of graphene oxide (GO) multilayer type. These results suggest the GO derived from rice husk can be a candidate for the development of applications in technological areas such as flexible electronic devices and systems, sensors, batteries, supercapacitors for energy storage, and bioremediation systems, among other technological applications.

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Section: Resultsmentioning

confidence: 98%

Pyrolysis system to obtain carbonaceous material from rice husk used as a precursor

Castro-Ladino

Vacca-Casanova

Cuy-Hoyos

2020

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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“…The XRD peak intensities (002 planes) were increased with an increase in the doping concentration of nitrogen. The difference in peak shape reflects overlapped N-rGO sheets along the c-axis [54] and higher sample crystallinity [55]. The increase in the peak shape points to overlapped N-rGO sheets along the c-axis [54] and higher sample crystallinity [55].…”

Section: Xps Analysismentioning

confidence: 99%

“…The difference in peak shape reflects overlapped N-rGO sheets along the c-axis [54] and higher sample crystallinity [55]. The increase in the peak shape points to overlapped N-rGO sheets along the c-axis [54] and higher sample crystallinity [55]. This agrees with the calculated crystallite size along the c-axis (L c ) (Table 3), which was derived using Scherer's Equation and a dimensionless form factor of K = 0.90 [56].…”

Section: Xps Analysismentioning

confidence: 99%

Effect of Nitrogen Doping on the Optical Bandgap and Electrical Conductivity of Nitrogen-Doped Reduced Graphene Oxide

et al. 2021

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Graphene as a material for optoelectronic design applications has been significantly restricted owing to zero bandgap and non-compatible handling procedures compared with regular microelectronic ones. In this work, nitrogen-doped reduced graphene oxide (N-rGO) with tunable optical bandgap and enhanced electrical conductivity was synthesized via a microwave-assisted hydrothermal method. The properties of the synthesized N-rGO were determined using XPS, FTIR and Raman spectroscopy, UV/vis, as well as FESEM techniques. The UV/vis spectroscopic analysis confirmed the narrowness of the optical bandgap from 3.4 to 3.1, 2.5, and 2.2 eV in N-rGO samples, where N-rGO samples were synthesized with a nitrogen doping concentration of 2.80, 4.53, and 5.51 at.%. Besides, an enhanced n-type electrical conductivity in N-rGO was observed in Hall effect measurement. The observed tunable optoelectrical characteristics of N-rGO make it a suitable material for developing future optoelectronic devices at the nanoscale.

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“…For example, N-doping of graphene, with nitrogen atoms replacing carbon atoms, is reported to increase the electronic conductivity and wettability of graphene nanosheets, which are beneficial for the electron and electrolyte ion transport during the energy storage process [25]. Further, Ndoping lso introduces pseudo-capacitance in carbons materials to further improve the capacitance of the graphene electrode [26,27]. During the nitrogen configurations (pyridinic, pyrrolic and pyridone groups), the basal-plane pyridinic N was found to have a dominant role in the capacitance enhancement [9,28].…”

Section: Introductionmentioning

confidence: 99%

Facile and controllable synthesis N-doping porous Graphene for high-performance Supercapacitor

Tang

Gao

et al. 2020

Journal of Electroanalytical Chemistry

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Enhanced capacitance properties of nitrogen doped reduced graphene oxide obtained by simultaneous reduction and nitrogen doping

Cited by 40 publications

References 32 publications

Pyrolysis system to obtain carbonaceous material from rice husk used as a precursor

Pyrolysis system to obtain carbonaceous material from rice husk used as a precursor

Effect of Nitrogen Doping on the Optical Bandgap and Electrical Conductivity of Nitrogen-Doped Reduced Graphene Oxide

Facile and controllable synthesis N-doping porous Graphene for high-performance Supercapacitor

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