Synthesis of carbon spheres by atmospheric pressure chemical vapor deposition from a serial of aromatic hydrocarbon precursors

Gutiérrez-García, Carmen Judith; Ambriz-Torres, J. M.; Contreras-Navarrete, José de Jesús; Granados-Martínez, Francisco Gabriel; García-Ruiz, Diana Litzajaya; García-González, L.; Zamora-Peredo, L.; Ortega-Varela, Luis Fernando; Richaud, Arlette; Méndez, Francisco; Domratcheva‐Lvova, Lada

doi:10.1016/j.physe.2019.04.007

Cited by 27 publications

(15 citation statements)

References 60 publications

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“…: spectra c and e). For the spent catalysts, the Raman spectra show G‐band and D‐band, possibly due to the presence of carbon deposition (Fig. : spectra a*–e*).…”

Section: Resultsmentioning

confidence: 99%

Acrylic acid synthesis via condensation of acetic acid and formaldehyde catalyzed by silica aerogel‐supported SiW/PW/PMo oxides

Shen

Yin

et al. 2020

J of Chemical Tech & Biotech

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BACKGROUND: The demand for acrylic acid continues to increase rapidly due to its widespread application. The traditional production of acrylic acid originates from non-sustainable propylene oxidation. Considering the environmental requirements and economic sustainable development, it is of great significance to exploit new routes to replace the petrochemical route.RESULTS: Comparison of silica aerogel-supported SiW/PW/PMo catalysts shows that PW/SiO 2 catalyst with 30 wt% loading and calcined at 450°C provides the best performance for the condensation of acetic acid and formaldehyde. Increasing the reaction temperature from 340 to 400°C leads to the best acrylic acid selectivities of 87.1-84.2% at formaldehyde conversions of 35.7-45.2%. CONCLUSIONS: The catalytic performance of PW/SiO 2 catalyst increases with increasing PW loading. The acidic and basic sites of the catalyst, especially the weak ones, are of vital importance to the synthesis of acrylic acid via the aldol condensation of acetic acid and formaldehyde.

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“…: spectra c and e). For the spent catalysts, the Raman spectra show G‐band and D‐band, possibly due to the presence of carbon deposition (Fig. : spectra a*–e*).…”

Section: Resultsmentioning

confidence: 99%

Acrylic acid synthesis via condensation of acetic acid and formaldehyde catalyzed by silica aerogel‐supported SiW/PW/PMo oxides

Shen

Yin

et al. 2020

J of Chemical Tech & Biotech

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“…The CNSs obtained in this research are similar to those synthesized by other researchers using different precursors that allows the formation of the smallest spheres (100-200 nm) according to experimental conditions. [6,27,28,33] It can be seen that the formed nanoparticles have a non-uniform, discrete spherical shape particles with curved surface and an average diameter from 100 to 200 nm. As can be observed the CNSs are presented as a conglomeration of spherical bodies.…”

Section: Resultsmentioning

confidence: 99%

“…The results obtained here are similar to those observed by others researchers, and they suggest that the mechanism of formation of carbon is influenced by both the environmental and the nature of solid surface on which carbon is nucleated. [6,32] Figure 3 shows SEM-EDX of as-prepared CNSs. These particles seem to form a network-like structure by joining together.…”

Section: Resultsmentioning

confidence: 99%

“…[5] The spherical forms were classified according to their nanometric texture: concentric, radial, or random arrangement of the carbon layers. [1,[4][5][6][7] Serp et al [8] have classified these structures according to their size in three classes: carbon onions (2-20 nm, with a closed graphite layer), carbon nanospheres (50 nm-1 μm) and carbon beads (above 1 μm). In the two past decades, CNSs have attracted significant attention in the fields of optoelectronics, medicine, engineering, chemistry, and physics, with highlights in lubricants, the development of nanodevices for better energy storage, combinatorial synthesis, encapsulating electrodes, separation technology, and others.…”

Section: Introductionmentioning

confidence: 99%

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One-step synthesis and characterization of carbon nanospheres via natural gas condensate pyrolysis

Boufades¹,

Mesdour²,

Moussiden

et al. 2020

Fullerenes, Nanotubes and Carbon Nanostructures

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In the current work, carbon nanospheres (CNSs) were prepared via pyrolysis of gas condensate in N 2 at 1273 K and atmospheric pressure for 2 h using ferric chloride as a catalyst precursor. X-ray diffraction, energy dispersive X-ray spectrometry (EDX) in scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectrometry (Raman), Fourier transform infrared spectroscopy, and thermal gravimetric analysis (TGA) are employed for the structural and morphological characterization of the nanomaterials formed. The conductivity of these films was measured using the four probe method. As results, SEM-EDX and TEM analysis reveal spherical shaped particles, with diameter varying between 100 and 200 nm and graphene interlayer distance of 0.339 nm. The very low ID/IG ratio obtained reveals a relatively low amount of disorder in the nanostructures and TGA analysis implies that thermal stability was achieved after 470°C. Our work provides a simple synthetic strategy in one-step sample preparation of CNSs, which can be used for furfur applications such as high-performance supercapacitors or adsorbents.

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“…Gaseous and liquid carbon materials can readily be used to make HCSs in a one-stage CVD reactor [29,34,35]. However, the use of solid carbon materials requires the conversion of the solid material into gaseous products in a preliminary step prior to decomposition of the carbon source.…”

Section: Resultsmentioning

confidence: 99%

CVD Synthesis of Solid, Hollow, and Nitrogen-Doped Hollow Carbon Spheres from Polypropylene Waste Materials

Tripathi¹,

Durbach²,

Coville³

2019

Applied Sciences

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Plastic waste leaves a serious environmental footprint on the planet and it is imperative to reduce this. Consequently, recycling has been regarded as an important approach in providing one solution to this problem. In this study, we enhanced the value of polypropylene (PP) plastic waste by using it as a hydrocarbon source to synthesize a variety of spherical carbon nanomaterials. Here, a CVD method was used to decompose the PP initially into a hydrocarbon gas (propylene). Thereafter, PP was employed to synthesize solid carbon spheres (SCSs), hollow carbon spheres (HCSs), and nitrogen-doped hollow carbon spheres (NHCSs). The latter two were made using a silica template while the N-doping was achieved by the addition of melamine to PP. Yields obtained were between 12–20%. The SCSs (d = 800 nm to 1200 nm), HCSs (id = 985 nm; shell width = 35 nm), and NHCSs (id = ca. 1000 nm; shell width = 40 nm) were all characterized by TEM, SEM, TGA, laser Raman spectroscopy, and XPS.

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Synthesis of carbon spheres by atmospheric pressure chemical vapor deposition from a serial of aromatic hydrocarbon precursors

Cited by 27 publications

References 60 publications

Acrylic acid synthesis via condensation of acetic acid and formaldehyde catalyzed by silica aerogel‐supported SiW/PW/PMo oxides

Acrylic acid synthesis via condensation of acetic acid and formaldehyde catalyzed by silica aerogel‐supported SiW/PW/PMo oxides

One-step synthesis and characterization of carbon nanospheres via natural gas condensate pyrolysis

CVD Synthesis of Solid, Hollow, and Nitrogen-Doped Hollow Carbon Spheres from Polypropylene Waste Materials

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