Preparation characterization and non-isothermal decomposition kinetics of different carbon nitride sheets

El‐Shafie, M.; Younis, Sherif A.; Serp, Philippe; Gad, E. A. M.

doi:10.1016/j.ejpe.2019.09.003

Cited by 38 publications

(21 citation statements)

References 32 publications

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“…5 f. The synthesized catalyst was stable up to 400 °C, although its partial mass loss in the range of 50 °C to 100 °C was due to the evaporation of adsorbed water or air contaminants collected by the solids. The observed mass reduction in the range of 100 °C to about 500 °C can be related to the destruction of organic parts and thermal deformation/collapse of the CN 23 , 47 . The CN–Pr–Met–Cu(II) main mass loss occurred at 500 °C to 700 °C, which was related to the thermal decomposition or deformation of heptazine units in the structure of the CN 47 .…”

Section: Resultsmentioning

confidence: 94%

“…The observed mass reduction in the range of 100 °C to about 500 °C can be related to the destruction of organic parts and thermal deformation/collapse of the CN 23 , 47 . The CN–Pr–Met–Cu(II) main mass loss occurred at 500 °C to 700 °C, which was related to the thermal decomposition or deformation of heptazine units in the structure of the CN 47 . The CN–Pr–Met–Cu(II) has higher thermal stability than CN, and this may be due to the synergistic effect and supramolecular interactions between carbon nitride and other components of the catalyst 48 .…”

Section: Resultsmentioning

confidence: 94%

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Tandem oxidative amidation of benzylic alcohols by copper(II) supported on metformin-graphitic carbon nitride nanosheets as an efficient catalyst

Ghafuri

Gorab

Dogari

2022

Sci Rep

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In this research, an efficient heterogeneous catalyst based on graphitic carbon nitride nanosheets (CN) has been reported. The CN was functionalized by 1,3-dibromopropane as a linker (CN–Pr–Br) and subsequently modified with metformin (CN–Pr–Met). Furthermore, the copper(II) was coordinated on modified CN (CN–Pr–Met–Cu(II)) and during this process, 7.94% copper(II) was loaded into the catalyst structure. The synthesized catalyst was evaluated by various techniques including fourier-transform infrared spectroscopy (FT-IR), energy dispersive X-ray spectroscopy (EDS), field emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and inductively coupled plasma atomic emission spectroscopy (ICP-OES). CN–Pr–Met–Cu(II) was used as a catalyst in the synthesis of amides via the oxidation of benzyl alcohols. The conditions of this reaction were optimized in terms of temperature, time, amount of catalyst, type of base, oxidant, and solvent. Moreover, a variety of amides with an efficiency of 75–95% were synthesized. The reaction was carried out in the presence of benzyl alcohols, amine hydrochloride salts, tert-butyl hydroperoxide (TBHP), CaCO3, and CN–Pr–Met–Cu(II) at 80 °C of acetonitrile solvent. The synthesized catalyst can be easily separated from the reaction medium and reused for 7 consecutive runs without a significant reduction in reaction efficiency.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 94%

Tandem oxidative amidation of benzylic alcohols by copper(II) supported on metformin-graphitic carbon nitride nanosheets as an efficient catalyst

Ghafuri

Gorab

Dogari

2022

Sci Rep

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“…These results are in good agreement with previous reports of the TGA of C 3 N 4 carried out in nitrogen. 26 As shown by mass spectrometry, 27 gaseous CN and C 2 N 2 species and N 2 are formed during the decomposition of C 3 N 4 . Addition of ammonium heptamolybdate (AHM) by impregnation results in the decrease of C 3 N 4 decomposition temperature by nearly 100 °C (Fig.…”

Section: Resultsmentioning

confidence: 99%

Carbon nitride used as a reactive template to prepare mesoporous molybdenum sulfide and nitride

Ryaboshapka

Afanasiev

2021

RSC Adv.

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“…The surface roughness of the exfoliated PCN was analyzed by AFM measurement, as presented in Figure g–i. The theoretical thickness of the PCN monolayer is reported to be 0.4 nm in the literature. , The height profile of the exfoliated PCN suggested that there are five to six multilayers formed due to exfoliation substantiating XRD and topology analysis by SEM and TEM.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Room-Temperature Ethanol Detection by Quasi 2D Nanosheets of an Exfoliated Polymeric Graphitized Carbon Nitride Composite-Based Patterned Sensor

et al. 2022

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A novel room-temperature gas sensor composed of polymeric graphitic carbon nitride composite was fabricated and used for the detection of ethanol vapor under ambient conditions. Polymeric carbon nitride (PCN) microstructures composed of fluffy nanosheets were synthesized via a thermal polycondensation mechanism using melamine as the precursor, followed by vigorous chemical exfoliation. These sheet-like microstructures were employed as active materials in the form of composites, along with carbon paste consisting of graphite nanoplatelets and carbon black. The active sensing layer was fabricated on a PET sheet and assembled on an interdigitated gold electrode. The as-fabricated sensor exhibited excellent sensing efficiency (>100% response at 10 ppm) along with high selectivity and stability. In particular, for ultralow concentrations such as 1 ppm (>10% response), this resistive-based sensor exhibited a swift response time provided under ambient conditions. The exfoliated PCN composite sensor was found to be working with appreciable efficiency at moderate relative humidity (%) with the least fluctuation in response signals also demonstrating long-term stability for 30 days with consistent response signals.

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Preparation characterization and non-isothermal decomposition kinetics of different carbon nitride sheets

Cited by 38 publications

References 32 publications

Tandem oxidative amidation of benzylic alcohols by copper(II) supported on metformin-graphitic carbon nitride nanosheets as an efficient catalyst

Tandem oxidative amidation of benzylic alcohols by copper(II) supported on metformin-graphitic carbon nitride nanosheets as an efficient catalyst

Carbon nitride used as a reactive template to prepare mesoporous molybdenum sulfide and nitride

Enhanced Room-Temperature Ethanol Detection by Quasi 2D Nanosheets of an Exfoliated Polymeric Graphitized Carbon Nitride Composite-Based Patterned Sensor

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