Synthesis and Characterization of Si/SiO2/SiC Composites Through Carbothermic Reduction of Rice Husk-based Silica

Nayak, Puja Priyadarshini; Datta, Anindita

doi:10.1007/s12633-022-02278-2

Cited by 7 publications

(3 citation statements)

References 34 publications

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“…The most pronounced transmittance peaks in the geopolymerized mixture, typically at 1269 cm −1 and 1225 cm −1 , arise from the asymmetric stretching vibrations of the Si–O-T band, where T signifies tetrahedral Si or Al [ 44 ]. Peaks at 1125 cm −1 , 1081 cm −1 , and 1032 cm −1 are indicative of Si-O-Si asymmetric stretching [ 45 , 46 ]. These peaks are characteristic of crystalline silica, indicating that the silica extracted from RH via the sol–gel method contains a component of crystalline silica, confirming the results in the XRD diffractograms.…”

Section: Resultsmentioning

confidence: 99%

A Comparative Study on Rice Husk, as Agricultural Waste, in the Production of Silica Nanoparticles via Different Methods

Yuan,

Hou,

Liu

et al. 2024

Materials

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This study explores the conversion of agricultural waste into valuable industrial precursors, specifically focusing on the production of silica nanoparticles from rice husk (RH) via calcination and sol–gel processes. The synthesized particles underwent detailed analysis to assess their chemical composition, structural features, morphological characteristics, and size distribution. This comparative analysis evaluates the effectiveness of various methods in generating silica from RH and examines the impact of different drying techniques, including freeze-drying and conventional thermal drying, on the properties of the resulting silica nanoparticles. Utilizing a combination of sol–gel and freeze-drying techniques produced spherical nanoparticles with diameters of 10 to 20 nm, characterized by size uniformity, clear contours, and minimal aggregation. X-ray diffraction (XRD) analysis identified the amorphous nature of the silica, as evidenced by diffraction peaks typical of amorphous silica in the RH-derived samples processed via different methods. Significantly, the XRD patterns of the calcination-derived silica showed no foreign peaks, indicating a purer amorphous state. The findings of this study are anticipated to contribute to the development of innovative and efficient silica nanomaterials, fostering the sustainable use of agricultural waste.

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Section: Resultsmentioning

confidence: 99%

A Comparative Study on Rice Husk, as Agricultural Waste, in the Production of Silica Nanoparticles via Different Methods

Yuan,

Hou,

Liu

et al. 2024

Materials

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“…Rice husk Charcoal (RHC) is a waste material produced after the production of rice husk electricity, it has a very high amorphous silica content (95%) and after burning the waste material is usually land lled which can cause some serious environmental problems, at this time its reuse as a ller in composite materials can solve the problem of the large accumulation of electricity waste RHC due to the growth of the population and the increased demand for rice and electricity, as it is not only cheap but also solves the problem of environmental pollution caused by land lls [24][25][26] . Polypropylene (PP) is one of the most consumed varieties of plastics, a polymer made from the polymerization of propylene monomer, usually divided into homopolymer polypropylene, block copolymer polypropylene and random copolymer polypropylene to aggregate state structure makes it has good electrical properties and insulation properties as well as almost no change in performance due to moisture, but PP as a petroleum-based plastic when used in large quantities to cause environmental pollution, has a low modulus, poor heat resistance and easy ageing which limits its further application [27,28] .…”

Section: Introductionmentioning

confidence: 99%

Crystallization Behaviours Regulations and Thermostability Enhancement Strategy of Polypropylene Composites modified by Dispersed Rice Husk Charcoal

Shen,

Deng,

Feng

et al. 2024

Preprint

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Polypropylene has a wide range of applications in scientific research, industry, and production due to its excellent mechanical properties and chemical stability. However, owing to its low melt strength, inferior dimensional stability, and poor thermal stability, thus limiting its further application. Addressing this challenge, a series of polymer composites consisting of rice husk charcoal (RHC), modified using 3-glycidyloxypropyltrimethoxysilane (KH560) as the silane coupling agent, and polypropylene (PP) have been fabricated by virtue of a melt blending process by us. Thermal behaviour, crystallization properties, mechanical properties, dimensional stability and microscopic morphology of PP/RHC composites are studied in detail. The results show that, when 20% modified RHC was added to the composites, it increased the initial decomposition temperature of PP by 130℃, which represents that we manufactured PP composites with better thermal properties by simple processing. The rheological performance tests showed that the addition of RHC increased the stiffness and dimensional stability of the composites, which is more conducive to the processing and moulding of the material. SEM indicated that KH-560 can increase the compatibility of RHC with PP substrate, thus improving the performance of conforming materials.

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“…The rice husk has advantages like good biochemical and physicochemical properties, which are suitable carbon sources. Some application of rice husk-base carbon is activated carbon (Nayak & Datta, 2023), adsorbents (Mortada et al, 2023), supercapacitors (Liu et al, 2023), and electrodes (Daulay & Gea, 2022). Rice husk has an ash content of 18-29%, moisture content of 6.0-10.0%, carbon content of 35.0-42.0%, lignocellulose and cellulose content of 40%, 5% hemicellulose as a sugar polymer material and a remaining five carbon content of silica, alkali minerals, etc.…”

Section: Introductionmentioning

confidence: 99%

Influence of Sieve Size on Calorific Value and Proximate Properties of Bio-Briquette Composites

Aliah,

Winarti,

Iman

et al. 2023

J. Ecol. Eng.

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This work aimed to observe the influence of calorific value and proximate properties in the fabrication of rice husk (RH) and coffee shell (CS) briquettes composite. Rice and coffee husks contain cellulose, hemicellulose, and lignin. These contents are necessary for the adhesive to bind the briquette (amylose and amylopectin). The raw materials were carbonized at 400 °C for 60 minutes. Variations of sieving size (60, 80, and 100 mesh) and the composition ratio of raw material CS:RH were reviewed to study their effect. Tests of density, moisture content, volatile matter content, ash content, fixed carbon content, shatter index, combustion rate, and calorific value were carried out to determine the optimum composition. The results were obtained with the best quality at a particle size of 60 mesh with the highest calorific value of 17.422 MJ/kg. It showed that the briquettes have good quality and are comparable with the standard briquette.

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Synthesis and Characterization of Si/SiO2/SiC Composites Through Carbothermic Reduction of Rice Husk-based Silica

Cited by 7 publications

References 34 publications

A Comparative Study on Rice Husk, as Agricultural Waste, in the Production of Silica Nanoparticles via Different Methods

A Comparative Study on Rice Husk, as Agricultural Waste, in the Production of Silica Nanoparticles via Different Methods

Crystallization Behaviours Regulations and Thermostability Enhancement Strategy of Polypropylene Composites modified by Dispersed Rice Husk Charcoal

Influence of Sieve Size on Calorific Value and Proximate Properties of Bio-Briquette Composites

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