Ultra-fine beta SiC nanowires Isothermally converted from high activated silica by Carbothermic Reduction and Carburization at low temperature

Kocaman, Engin; Çalışkan, Fatih

doi:10.1016/j.matchemphys.2020.123716

Cited by 9 publications

(5 citation statements)

References 53 publications

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“…Moreover, S. Ren et al [53] related the presence of metallic ruthenium after calcination in a nitrogen atmosphere to the auto-reduced effect caused by carbonaceous supports. symmetric stretching mode Si-C bond [44,54]. However, the possible Ru-O vibration over the support (900 cm -1 ) was masked by the strong peak at 825 cm -1 [55].…”

Section: Influence Of Thermal Treatmentmentioning

confidence: 99%

Hydrogen production by ammonia decomposition over ruthenium supported on SiC catalyst

Pinzón

Romero

Lucas-Consuegra

et al. 2021

Journal of Industrial and Engineering Chemistry

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Section: Influence Of Thermal Treatmentmentioning

confidence: 99%

Hydrogen production by ammonia decomposition over ruthenium supported on SiC catalyst

Pinzón

Romero

Lucas-Consuegra

et al. 2021

Journal of Industrial and Engineering Chemistry

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“…First, the carbon black and silicon dioxide powder were ground using a ball mill (MUBM-240, Taiwan). The ball milling parameter values were adopted from the studyies by Kocaman and Çalışkan [17] and Chaira et al [20]. The milled beads are composed of 93% alumina, with a diameter of 10 mm.…”

Section: Synthesis Procedures Of Sic Whiskersmentioning

confidence: 99%

“…The results showed that the as-formed products exhibited the characteristic peak of 3C-SiC, and the diffraction peak intensity increased with pyrolysis time. Kocaman and Çalışkan [17] found that the SiC whiskers obviously enlarged and thickened obviously as the pyrolysis time increased from 2 to 4 h at 1475 ℃.…”

Section: Introductionmentioning

confidence: 99%

“…Considering the range of mechanical lapping parameters, Sherif El-Eskandarany et al [19] used mechanical alloying to produce purely stoichiometric β-SiC powder within 300 h. They obtained uniform, smooth, and spherical β-SiC particles with a mean particle size smaller than 0.5 μm. Chaira et al [20] reported that the silicon carbide crystal size decreased after less than with 20 h. Kocaman and Çalışkan [17] demonstrated that the mechanical lapping process could shorten the preparation time and the particle size of silicon carbide. After milling, the components were mixed thoroughly, and the number of chemically active defect sites increased, resulting in a significantly low silicon carbide nucleus formation energy.…”

Section: Introductionmentioning

confidence: 99%

“…The integrated mechanical and thermal activation process (IMTA) combines carbon thermal reduction and mechanical activation. Mechanical activation is beneficial for reducing the pyrolysis temperature and heating time [17] because the small particle size due to grain breakage is conductive to overcoming the limitations induced by thermodynamics [18].…”

Section: Introductionmentioning

confidence: 99%

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Clean synthesis of silicon carbide whiskers using recycled carbon black and waste silicon dioxide

Ie,

Chen,

Dai

et al. 2024

Preprint

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This study aimed to synthesize a high-value product, silicon carbide (SiC) whickers, using carbon black from recycled tires and waste silicon dioxide obtained from the photovoltaic industry via mechanical and thermal activation (IMTA) technology. Diverse whisker morphologies, including needle-like, nanowire-like, bamboo-like, and bead-like structures, were obtained. Furthermore, the effects of the synthesis parameters, such as the ball milling time, carbon‒silicon molar ratio, pyrolysis temperature, and pyrolysis time, on the quality of the SiC whiskers were investigated. The results showed that the carbon‒silicon ratio had the greatest impact on whisker formation, followed by the pyrolysis temperature, pyrolysis time, and ball-milling time. The purity of the synthesized silicon carbide whiskers was observed in the range of 42.63%-54.84%. Both the pyrolysis temperature and time improved the properties of the SiC. Additionally, the strength, hardness, abrasion resistance of the rubber and wear-resistant paint could be improved by adding less than 4% synthesized SiC whiskers, as confirmed via commercial product testing. The excellent performance of the synthesized SiC whiskers and the competitive market advantage of improving the product quality at a low economic cost were confirmed in this study.

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Next-Generation Green Hydrogen: Progress and Perspective from Electricity, Catalyst to Electrolyte in Electrocatalytic Water Splitting

Gao,

Chen,

Wang

et al. 2024

Nano-Micro Lett.

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Green hydrogen from electrolysis of water has attracted widespread attention as a renewable power source. Among several hydrogen production methods, it has become the most promising technology. However, there is no large-scale renewable hydrogen production system currently that can compete with conventional fossil fuel hydrogen production. Renewable energy electrocatalytic water splitting is an ideal production technology with environmental cleanliness protection and good hydrogen purity, which meet the requirements of future development. This review summarizes and introduces the current status of hydrogen production by water splitting from three aspects: electricity, catalyst and electrolyte. In particular, the present situation and the latest progress of the key sources of power, catalytic materials and electrolyzers for electrocatalytic water splitting are introduced. Finally, the problems of hydrogen generation from electrolytic water splitting and directions of next-generation green hydrogen in the future are discussed and outlooked. It is expected that this review will have an important impact on the field of hydrogen production from water. Graphical Abstract

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Ultra-fine beta SiC nanowires Isothermally converted from high activated silica by Carbothermic Reduction and Carburization at low temperature

Cited by 9 publications

References 53 publications

Hydrogen production by ammonia decomposition over ruthenium supported on SiC catalyst

Hydrogen production by ammonia decomposition over ruthenium supported on SiC catalyst

Clean synthesis of silicon carbide whiskers using recycled carbon black and waste silicon dioxide

Next-Generation Green Hydrogen: Progress and Perspective from Electricity, Catalyst to Electrolyte in Electrocatalytic Water Splitting

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