Synthesis and characterization of SiC/Si3N4 composites from rice husks

Real, C.; Córdoba, J.M.; Alcalá, M.D.

doi:10.1016/j.ceramint.2018.05.090

Cited by 18 publications

(11 citation statements)

References 37 publications

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“…The results obtained here are in agreement with those found elsewhere [11,23], although the methodology of the present work did not include rice husk pretreatments.…”

Section: Rice Husksupporting

confidence: 92%

“…There are different works on the synthesis of silicon carbide starting from rice husk, pyrolyzed rice husk, or rice husk ash prepared under laboratory conditions [10]. Works focusing on silicon nitride and silicon oxynitride production are less frequent, and in most cases, rice husk pretreatments were usually employed, where grinding [11], pyrolysis [12], digestion in acid solutions [13], and other similar methods [9,10,12,[14][15][16][17][18][19][20][21][22][23][24] have been used. Pretreatments pose a burden and additional costs to an industrial operation.…”

Section: Introductionmentioning

confidence: 99%

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α-Si3N4 and Si2N2O whiskers from rice husk and industrial rice husk ash

Parrillo¹,

Sánchez²,

Alles³

2021

SN Appl. Sci.

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Rice industrialization worldwide generates significant amounts of rice husk as a by-product. When rice husk is burned to obtain energy, a relatively common practice, a substantial portion of the husk turns into ash, and both constitute environmental liabilities. Using rice husk and ash as starting materials to produce high-value products could help in mitigating the environmental impact while providing economic revenue. Rice husk and rice husk ash as produced in a local cogeneration plant without any pretreatments were evaluated as feasible sources for silicon nitride (Si3N4) and silicon oxynitride (Si2N2O) whiskers by carbothermal reduction and nitridation. Rice husk and the ash were held at temperatures between 1200 and 1400 °C for 3 h under flowing nitrogen. Increasing soaking temperature values led to higher whisker development for both starting materials, with the best results observed at 1400 °C. Whereas α-silicon nitride whiskers were obtained when rice husk was employed, the graphite surface-to-ash ratio dictated whisker composition for the ash. Treatment of the ash at the soaking temperature value of 1400 °C led to silicon oxynitride for lower graphite surface-to-ash ratios, but when this ratio was increased, α-silicon nitride predominated. α-silicon nitride whiskers had cross sections ranging from about 100 nm to 1 µm in width, whereas the silicon oxynitride whiskers had cross sections ranging from approx. 100 to 500 nm in diameter. Both types of whiskers were observed to be in the millimeter length range.

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“…The results obtained here are in agreement with those found elsewhere [11,23], although the methodology of the present work did not include rice husk pretreatments.…”

Section: Rice Husksupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

α-Si3N4 and Si2N2O whiskers from rice husk and industrial rice husk ash

Parrillo¹,

Sánchez²,

Alles³

2021

SN Appl. Sci.

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“…Thus, in this study, silica will be extracted from rice husks. Rice husk and rice husk ash (RHA) are interesting material sources containing high-quality levels of silica (Real, Córdoba & Alcalá, 2018). Nowadays, silica can be categorized as one of the valuable components and could be applied widely in different fields, such as the biotechnology field, medical field and raw material for a certain industry.…”

Section: Introductionmentioning

confidence: 99%

Effect of Coating Mild Steel with Polyaniline Added Extracted Silica from Rice Husks and Its Corrosion Behaviour in Hydrochloric Acid Solution

Tarmizi¹,

Dali²,

Mamauod³

2021

IJARBSS

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This study was conducted to study the effect of extracted silica content in polyaniline silica composite towards corrosion protection of mild steel in 2 M hydrochloric acid. The silica was extracted from paddy husk by incineration method at 800ºC for 5 hours in a muffle furnace. The white ash formed was then treated with NaOH to obtain trisilicate, which was then treated further with H2SO4 to obtain silica precipitate on the top of the solution. Polyaniline (PANI) was prepared by in situ polymerizations of aniline, HCl and potassium dichromate. The polyaniline silica composite (PSC) was prepared by adding the extracted silica, weighing 0.2g (PSC 0.2), 0.4g (PSC 0.4) and 0.6 g (PSC 0.6), into the synthesized PANI. The extracted silica, PANI and PSC 0.6, were characterized by FTIR analysis. The presence of extracted silica is supported by the FTIR analysis. The corrosion protection performance of PANI, PSC 0.2, PSC 0.4 and PSC 0.6 was then compared by immersing the bare mild steel, mild steel coated with PANI and mild steel coated with PSC 0.2, PSC 0.4, and PSC 0.6 in 2 M HCl for 24 hours. The weight loss method was used in this study to investigate the corrosion behaviour of the samples. PCS 0.6 revealed the lowest corrosion rate, which was 0.95 g. The corrosion protection of PSC coating increases directly proportional to the silica contents in PSC. The temperature study showed as the temperature increased, the corrosion rate will also be increased. This occurred due to the rise of kinetic energy as a higher temperature was used. PSC 0.6 showed the best protection even at a high temperature compared to other samples. FESEM analysis was also conducted to observe the surface properties of the sample when immersed in HCl solution.

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“…On the other hand, silicon exists in the form of amorphous silica in plants, for example, rice husks, reed leaves, oat husks, etc. − Chu et al reported a silicon/carbon composite by the one-pot carbonization/magnesiothermic reduction process of the rice husk . Being applied as an anodic material, it delivered a high reversible capacity of 560 mAh g –1 as cycled at a current density of 100 mA g –1 over 180 cycles with good structural stability. , Gao et al also synthesized the SiO x /C composite material derived directly from agricultural rice husk byproducts, which delivered a reversible capacity of nearly 600 mAh g –1 at a current density of 100 mA g –1 after 100 cycles .…”

Section: Introductionmentioning

confidence: 99%

A Low-Cost and High-Capacity SiO_x/C@graphite Hybrid as an Advanced Anode for High-Power Lithium-Ion Batteries

Niu

et al. 2020

ACS Omega

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Silicon suboxide (SiO x ) is one of the most promising anodes for the next-generation high-power lithium-ion batteries because of its higher lithium storage capacity than current commercial graphite, relatively smaller volume variations than pure silicon, and appropriate working potential. However, the high cost, poor cycling stability, and rate capability hampered its industrial applications due to its complex production process, volume changes during Li + insertion/extraction, and low conductivity. Herein, a low-cost and high-capacity SiO x /C@graphite (SCG) hybrid was designed and synthesized by a facile one-pot carbonization/hydrogen reduction process of the rice husk and graphite. As an advanced anode for lithium-ion batteries, the SiO x /C@graphite hybrid delivers a high reversible capacity with significantly enhanced cycling stability (842 mAh g –1 after 300 cycles at 0.5 A g –1 ) and rate capability (562 mAh g –1 after 300 cycles at 1 A g –1 ). The great improvement in performances could be attributed to the positive synergistic effect of SiO x nanoparticles as lithium storage active materials, the in situ-formed carbon matrix network derived from biomass functioning as an efficient three-dimensional conductive network and spacer to improve the rate capability and buffer the volume changes, and graphite as a conductor to further improve the rate capabilities and cycling stability by increasing the conductivity. The low-cost and high-capacity SCG derived from rice husk synthesized by a facile, scalable synthetic method turns out to be a promising anode for the next-generation high-power lithium-ion batteries.

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Synthesis and characterization of SiC/Si3N4 composites from rice husks

Cited by 18 publications

References 37 publications

α-Si3N4 and Si2N2O whiskers from rice husk and industrial rice husk ash

α-Si3N4 and Si2N2O whiskers from rice husk and industrial rice husk ash

Effect of Coating Mild Steel with Polyaniline Added Extracted Silica from Rice Husks and Its Corrosion Behaviour in Hydrochloric Acid Solution

A Low-Cost and High-Capacity SiO_x/C@graphite Hybrid as an Advanced Anode for High-Power Lithium-Ion Batteries

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Synthesis and characterization of SiC/Si3N4 composites from rice husks

Cited by 18 publications

References 37 publications

α-Si3N4 and Si2N2O whiskers from rice husk and industrial rice husk ash

α-Si3N4 and Si2N2O whiskers from rice husk and industrial rice husk ash

Effect of Coating Mild Steel with Polyaniline Added Extracted Silica from Rice Husks and Its Corrosion Behaviour in Hydrochloric Acid Solution

A Low-Cost and High-Capacity SiOx/C@graphite Hybrid as an Advanced Anode for High-Power Lithium-Ion Batteries

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Product

Resources

About

A Low-Cost and High-Capacity SiO_x/C@graphite Hybrid as an Advanced Anode for High-Power Lithium-Ion Batteries