Catalytic synthesis of SiC nanowires in an open system

Kao, Kechen; Jiang, Min; Ding, Lijuan; Lin, Wenxin; Chen, Jianjun

doi:10.1111/jace.16299

Cited by 13 publications

(5 citation statements)

References 32 publications

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“…It acts as a catalyst to decrease decomposition temperature of the hydrocarbon gas and promote the growth quality of SiC nanowires. Thus, compared with the previous reports of synthesizing SiC nanowires by ferrocene precursor 37 – 41 , the growth temperature in our experiment can be reduced to 1000 °C, but the SiC/SiO 2 nanowires are still successfully and densely synthesized with the lengths about ten micrometers.…”

Section: Discussionmentioning

confidence: 57%

“…metal catalyst is added (ex: Fe, Co, Ni) [29][30][31][32] . Besides, in order to grow SiC nanowires at lower temperature, many precursors have been tried, such as methyltrichlorosilane (MTS) 33,34 , polycarbosilane (PCS) 35 , polymethylsilane (PMS) 36 , ferrocene [37][38][39][40][41] or mixed precursors 42,43 , etc. Among these, ferrocene is a cheaper and safer precursor and it has been demonstrated to be an efficient catalyst precursor for the synthesis of carbon nanotubes 44 , whereas it is seldom to be used for the synthesis of SiC/SiO 2 nanowires.…”

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confidence: 99%

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Synthesis of SiC/SiO2 core–shell nanowires with good optical properties on Ni/SiO2/Si substrate via ferrocene pyrolysis at low temperature

Chen

Chi

Hsu

et al. 2021

Sci Rep

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In this study, the high-density SiC/SiO2 core–shell nanowires were synthesized on the nickel coated SiO2 (100 nm)/Si substrate by chemical vapor deposition (CVD) method with ferrocene precursor at temperature 1000 °C compared to previous studies (1300–1600 °C). The present work provides an efficient strategy for the production of SiC/SiO2 nanowires with uniform morphology and good optical properties, where the Ni layer plays important roles for this fabrication at low temperature which reduces the decomposition temperature of hydrocarbon gases and improves the growth quality of SiC nanowires. The as-synthesized SiC/SiO2 nanowires consist of single crystal 3C structures as well as 3C structures with defects along [111] direction. In the photoluminescence (PL) spectrum, the SiC/SiO2 core–shell nanowires revealed an obvious blueshift. The blueshift is due to the formation of nanoscale silicon carbide polytypism caused by the stacking faults in 3C–SiC and the nanoscale polytypism also caused the transition from indirect to direct bandgap which explains why the stacking faults percentage in SiC confirmed from X-ray diffraction (XRD) is 19%, but ultimately makes the strongest emission intensity. Finally, the PL characteristics are further improved by changing the diameter of the SiC nanowire and etching and an approximate model followed by the vapor–liquid–solid (VLS) mechanism was proposed to explain the possible growth mechanism of the SiC/SiO2 nanowires.

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Section: Discussionmentioning

confidence: 57%

mentioning

confidence: 99%

Synthesis of SiC/SiO2 core–shell nanowires with good optical properties on Ni/SiO2/Si substrate via ferrocene pyrolysis at low temperature

Chen

Chi

Hsu

et al. 2021

Sci Rep

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“…25 When GO was sintered with a Si source, a diffraction peak at 21.8°of SiO 2 appeared, confirming the existence of noticeable SiO 2 in the samples as a byproduct of the reaction. 26 Raman spectra, as shown in Figure 3b, demonstrate the standard Raman peak of β-SiC with a TO (transverse optical, centered at around 796 cm −1 ) mode and the LO (longitudinal optical, centered at around 968 cm −1 ) mode. 27−29 Besides, characteristic peaks of C, namely, the D band at 1380 cm −1 and the G band at 1590 cm −1 , were detected for all the samples.…”

Section: Resultsmentioning

confidence: 91%

All-Ceramic SiC Aerogel for Wide Temperature Range Electromagnetic Wave Attenuation

Lan

Hou

Dong

et al. 2022

ACS Appl. Mater. Interfaces

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A novel type of all-ceramic SiC aerogel was fabricated by freeze casting and carbothermal reduction reaction processes using graphene oxide (GO) doped SiC nanowires suspensions as starting materials. The effect of GO addition (0, 1, 2, and 4 mg/mL) on the porous morphologies, chemical composition, and the electromagnetic (EM) performance of the SiC aerogels were investigated. The optimum all-ceramic SiC aerogel exhibits effective whole X-band attenuation (>90%) at a fixed thickness of 3.3 mm from room temperature to 400 °C. It is ultralight with a density of 0.2 g/cm 3 and possesses a low thermal conductivity of about 0.05 W/mK. The material composition remains stable at temperatures up to 800 °C. The lightweight, high thermal stability, low thermal conductivity, and excellent X-band attenuation performance at a fixed thin thickness make the allceramic SiC aerogels potential EM attenuation materials for many applications in harsh environments.

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“…Nanowires of SiC with a diameter of 30-80 nm were fabricated by a direct reaction of graphene nanosheets with Si and SiO vapours at 1500 • C without a catalyst [70]. β-SiC nanowires were fabricated with a diameter of 80-100 nm using silica powder and ethanol as feedstock and ferrocene as a catalyst at 1550 • C for 2 h [71].…”

Section: Synthesis Of Nanowires Of Sicmentioning

confidence: 99%

A Systematic Review on the Synthesis of Silicon Carbide: An Alternative Approach to Valorisation of Residual Municipal Solid Waste

Thulasiraman

Ganesapillai

2023

Processes

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Over the past several decades, industrialised and developing nations have attempted to enhance sustainability. Demands for energy and the acceleration in environmental deterioration are the two primary obstacles to progress. The daily generation of municipal solid waste has been a significant factor in the deterioration of the ecology. To address this issue, a considerable amount of municipal solid waste may be used to synthesise SiC nanomaterials from organic and inorganic fractions and use them as carbon and silica sources. Nanomaterials have progressively received widespread prominence as the development of particulate materials accelerates at an incredible rate. One such material is silicon carbide (SiC), which has garnered considerable interest due to its remarkable performance and wide variety of applications. This review article discusses the SiC polytypes, including cubic, hexagonal, and rhombohedral SiC. The characteristics of silicon carbide, such as its biomimetic, surface, and thermal properties, are also discussed. In addition, the synthesis of silicon carbide was described in depth, including microwave sintering, the calcination method, the carbothermal redox reaction, and much more. The final section describes the applications of silicon carbide, including wastewater treatment, medical implants, and gas detection.

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Catalytic synthesis of SiC nanowires in an open system

Cited by 13 publications

References 32 publications

Synthesis of SiC/SiO2 core–shell nanowires with good optical properties on Ni/SiO2/Si substrate via ferrocene pyrolysis at low temperature

Synthesis of SiC/SiO2 core–shell nanowires with good optical properties on Ni/SiO2/Si substrate via ferrocene pyrolysis at low temperature

All-Ceramic SiC Aerogel for Wide Temperature Range Electromagnetic Wave Attenuation

A Systematic Review on the Synthesis of Silicon Carbide: An Alternative Approach to Valorisation of Residual Municipal Solid Waste

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