Large-scale synthesis of monodisperse SiC nanoparticles with adjustable size, stoichiometric ratio and properties by fluidized bed chemical vapor deposition

Liu, Rongzheng; Liu, Malin; Chang, Jiaxing

doi:10.1007/s11051-016-3737-y

Cited by 27 publications

(21 citation statements)

References 36 publications

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“…The particle size of SiC@G core‐shell nanoparticles kept around 10 nm without much change with the increase in temperature, indicating that under such experimental conditions, the temperature of FB had no significant effect on particle size. It was found that the particle size was more strongly influenced by the velocity of the carrier gas in the FB‐CVD system and the high gas flow rate hindered further growth of the SiC nanoparticles 23 …”

Section: Resultsmentioning

confidence: 99%

“…It was found that the particle size was more strongly influenced by the velocity of the carrier gas in the FB-CVD system and the high gas flow rate hindered further growth of the SiC nanoparticles. 23 The XRD patterns of SiC@G core-shell nanoparticles are shown in Figure 3A. The peaks of all nanoparticles prepared at different temperatures appeared at 35.7°, 60.1°, and 71.9°.…”

Section: Resultsmentioning

confidence: 99%

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Controllable synthesis of SiC@Graphene core‐shell nanoparticles via fluidized bed chemical vapor deposition

et al. 2020

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SiC@Graphene (SiC@G) core‐shell nanoparticles were successfully prepared by a facile fluidized bed (FB) chemical vapor deposition (CVD) method. SiC@G core‐shell nanoparticles with an average size of 10 nm and graphene from 1 to 5 layers with a controllable thickness were obtained by finely adjusting the experimental temperatures. The formation of SiC nanoparticles and graphene layers was confirmed by the results of X‐ray diffraction (XRD) and Raman Spectroscopy. The graphene content in SiC@G core‐shell nanoparticles prepared at different temperatures was measured from thermogravimetric analysis (TG), which varied from 5.89% to 11.88 mass%. From X‐ray photoelectron spectroscopy (XPS) results, no absorption assigned to Si‐O band was detected, indicating the effective protection of the SiC nanoparticles against oxidation by the graphene shell to resist oxidation of SiC nanoparticles. This novel method of preparation of SiC@G core‐shell nanoparticles could be applied to large‐scale production and find diverse applications in related fields.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Controllable synthesis of SiC@Graphene core‐shell nanoparticles via fluidized bed chemical vapor deposition

et al. 2020

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“…[5][6][7][8] In particular, SiC nanoparticles with average sizes below 10 nm present quantum confinement effects and thus can be designed for semiconductor-based violet light sources because of their good stability and high optical band gap. [9][10][11] Various routes have been proposed for the synthesis of SiC nanoparticles over the last decade, including carbothermic reduction, 12 chemical vapor deposition (CVD), [13][14][15] ball milling, 16 laser ablation, 10 thermal/nonthermal plasma process, [17][18][19][20] and electrochemical/chemical etching. 9,21 However, it remains a significant challenge for the scalable production of ultrafine SiC nanoparticles with sizes smaller than 10 nm.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ultrafine silicon carbide nanoparticles using nonthermal arc plasma at atmospheric pressure

et al. 2021

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It remains a significant challenge for the scalable production of ultrafine silicon carbide (SiC) nanoparticles with sizes smaller than 10 nm. In this work, a novel process based on atmospheric nonthermal arc plasma was proposed for the continuous synthesis of ultrafine SiC nanoparticles. This low-cost and scalable technique allows preparation of SiC nanoparticles with small size (5-9 nm) and narrow size distribution via hexamethyldisilane (HMDS) decomposition in an argon/hydrogen plasma environment. The as-synthesized products were carbon-rich β-SiC nanoparticles with plentiful functional groups on the surface. The addition of hydrogen in plasma gas can tune the product characteristics, such as decreasing particle size, improving crystallinity, and reducing carbon and oxygen contents. Moreover, the as-prepared β-SiC nanoparticles had a high band gap (around 2.5 eV), and their photoluminescence peak showed an obvious blueshift relative to that of bulk β-SiC, which was mainly attributed to the quantum confinement effect induced by their ultrafine size. According to the spectral information of arc plasma, the formation of SiC nanoparticles in the plasma was discussed.

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“…17,18 However, without the assistance of catalysts or templates, it is very difficult to obtain hollow spheres by CVD process because of the homogenous nucleation mechanism of the pyrolysis products. 13-16 Al 2 O 3 particles could also be prepared by the CVD method, and the obtained products usually show less-agglomerated feature and narrower size distribution.…”

Section: Introductionmentioning

confidence: 99%

“…[13][14][15][16] Al 2 O 3 particles could also be prepared by the CVD method, and the obtained products usually show less-agglomerated feature and narrower size distribution. 17,18 However, without the assistance of catalysts or templates, it is very difficult to obtain hollow spheres by CVD process because of the homogenous nucleation mechanism of the pyrolysis products. To the best of our knowledge, there is no report for the synthesis of Al 2 O 3 hollow nanospheres by CVD process.…”

Section: Introductionmentioning

confidence: 99%

Al₂O₃ hollow nanospheres prepared by fluidized bed chemical vapor deposition and further heat treatment

et al. 2019

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Hollow‐structured Al2O3 nanospheres were prepared by chemical vapor deposition (CVD) and further heat‐treatment process. For the CVD process, a unique cooling gas loop was designed in the precursor delivery system and amorphous Al2O3 nanospheres with incomplete pyrolysis intermediated products were obtained in a vertical fluidized bed at 500℃. The microstructure of the nanospheres tended to hollow after subsequent heat treatment at 1300℃ in air. It was found that the obtained Al2O3 hollow nanospheres showed a size of 100‐450 nm in diameter and 20‐80 nm in shell thickness. Transmission electron microscopy (TEM) and X‐ray diffraction (XRD) analysis confirmed that the Al2O3 hollow nanospheres were α‐Al2O3. The possible formation mechanism was proposed based on the results of the thermal gravimetric (TG) measurement connected with a Fourier transform infrared spectrometry (FTIR). The novel method to prepare Al2O3 hollow nanospheres can inspire ideas for the design and synthesis of other hollow‐structured nanospheres.

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Large-scale synthesis of monodisperse SiC nanoparticles with adjustable size, stoichiometric ratio and properties by fluidized bed chemical vapor deposition

Cited by 27 publications

References 36 publications

Controllable synthesis of SiC@Graphene core‐shell nanoparticles via fluidized bed chemical vapor deposition

Controllable synthesis of SiC@Graphene core‐shell nanoparticles via fluidized bed chemical vapor deposition

Synthesis of ultrafine silicon carbide nanoparticles using nonthermal arc plasma at atmospheric pressure

Al₂O₃ hollow nanospheres prepared by fluidized bed chemical vapor deposition and further heat treatment

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Large-scale synthesis of monodisperse SiC nanoparticles with adjustable size, stoichiometric ratio and properties by fluidized bed chemical vapor deposition

Cited by 27 publications

References 36 publications

Controllable synthesis of SiC@Graphene core‐shell nanoparticles via fluidized bed chemical vapor deposition

Controllable synthesis of SiC@Graphene core‐shell nanoparticles via fluidized bed chemical vapor deposition

Synthesis of ultrafine silicon carbide nanoparticles using nonthermal arc plasma at atmospheric pressure

Al2O3 hollow nanospheres prepared by fluidized bed chemical vapor deposition and further heat treatment

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Al₂O₃ hollow nanospheres prepared by fluidized bed chemical vapor deposition and further heat treatment