The effect of varying N/C ratios of nitrogen precursors during non-metal graphene catalyst synthesis

Soo, Li Ting; Loh, Kee Shyuan; Mohamad, Abu Bakar; Daud, Wan Ramli Wan

doi:10.1016/j.ijhydene.2016.06.033

Cited by 15 publications

(2 citation statements)

References 37 publications

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“…The typical diffraction peak at around 27° has also been found in other nitrogendoped graphene or graphite materials. In fact, Horibe et al reported that this interplanar distance decreases monotonously with increasing N/C content ratio [38,39]. According to Horibe's reports, an interplanar distance of 3.31 Å would correspond to an N/C atomic ratio close to 0.6, which is actually very close to the one found by X-ray photoelectron spectroscopy for the materials under study.…”

Section: X-ray Diffraction (Xrd) Measurementssupporting

confidence: 76%

Nitrogen-carbon graphite-like semiconductor synthesized from uric acid

Dante¹,

Chamorro‐Posada

Vázquez-Cabo

et al. 2017

Carbon

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A new carbon-nitrogen organic semiconductor has been synthesized by pyrolysis of uric acid. This layered carbon-nitrogen material contains imidazole-, pyridine (naphthyridine)-and graphitic-like nitrogen, as evinced by infrared and X-ray photoelectron spectroscopies. Quantum chemistry calculations support that it would consist of a 2D polymeric material held together by hydrogen bonds. Layers are stacked with an interplanar distance between 3.30 and 3.36 Å, as in graphite and coke. Terahertz spectroscopy shows a behavior similar to that of amorphous carbons, such as coke, with non-interacting layers. This material features substantial differences from polymeric carbon nitride, with some characteristics closer to those of nitrogen-doped graphene, in spite of its higher nitrogen content. The direct optical band gap, dependent on the polycondensation temperature, ranges from 2.10 to 2.32 eV. Although in general the degree of crystallinity is low, in the material synthesized at 600 °C some spots with a certain degree of crystallinity can be found.

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Section: X-ray Diffraction (Xrd) Measurementssupporting

confidence: 76%

Nitrogen-carbon graphite-like semiconductor synthesized from uric acid

Dante¹,

Chamorro‐Posada

Vázquez-Cabo

et al. 2017

Carbon

View full text Add to dashboard Cite

show abstract

“…Other nitrogen-doped graphene or graphitic materials also feature the diffraction peak at around 27°. In fact, Horibe et al found that the interplanar distance monotonously decreased as the N/C content ratio increased [26,27]. However, other factors must be considered, provided that in pure carbon materials the interplanar distance can vary from 3.37 to 3.50 Å depending on the degree of layer-ordered stacking.…”

Section: X-ray Diffraction Measurementsmentioning

confidence: 99%

Comparison of the activities of C2N and BCNO towards Congo red degradation

Dante¹,

Martín-Ramos

Chamorro‐Posada

et al. 2019

Materials Chemistry and Physics

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An n-type organic carbon nitride semiconductor, C 2 N, was synthesized by the pyrolysis of uric acid, and its properties were investigated by scanning electron and transmission electron microscopies, X-ray powder diffraction, and vibrational, UV-visible and X-ray photoelectron spectroscopies. This novel material, composed of crystalline flakes, featured a broad absorption centered at 700 nm, possibly due to charge transfer, and a 2.49 eV band gap. Its catalytic performance was assessed for the treatment of effluents with the diazo dye Congo red, comparing it with that of boron carbon nitrogen oxide, BCNO. Both wide band gap semiconductors exhibited decolorizing activity in the dark, although the mechanisms were different and were not photocatalytic: BCNO was more effective towards the adsorptioncoordination due to the presence of B-O, while C 2 N was effective towards the adsorption and the advancement of the oxidation reaction. Their kinetic constants (0.19 and 0.02 min-1 for BCNO and C 2 N, respectively) were comparable to those of intermetallic compounds studied for azo dyes degradation in dark conditions. In view of the high color removal efficiency (97% after 20 min) and good reusability of BCNO, this study suggests a potential application of this catalyst for wastewater treatment, alone or in combination with C 2 N.

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Paracetamol Degradation and Disinfection Via Electrocatalytic Oxidation by Using N-doped Graphene as Anode

Zhang

Chen

et al. 2021

Catal Lett

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The effect of varying N/C ratios of nitrogen precursors during non-metal graphene catalyst synthesis

Cited by 15 publications

References 37 publications

Nitrogen-carbon graphite-like semiconductor synthesized from uric acid

Nitrogen-carbon graphite-like semiconductor synthesized from uric acid

Comparison of the activities of C2N and BCNO towards Congo red degradation

Paracetamol Degradation and Disinfection Via Electrocatalytic Oxidation by Using N-doped Graphene as Anode

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