Towards tunable size of silica particles from rice husk

Zulfiqar, Usama; Subhani, Tayyab; Husain, Syed Wilayat

doi:10.1016/j.jnoncrysol.2015.08.037

Cited by 51 publications

(24 citation statements)

References 29 publications

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“…Santana and Paranhos [46], and Zulfiqar et al [47] extracted silica by the same method with some modifications. They extracted silica from RH in two steps: (i) conversion of RH into RHA; and (ii) formation of amorphous silica.…”

Section: Chemical Methodsmentioning

confidence: 99%

Rice husk/rice husk ash as an alternative source of silica in ceramics: A review

Hossain

Mathur

Roy

2018

Journal of Asian Ceramic Societies

279

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Use of waste or by-products from different industries and the agricultural sector has received increasing attention in the scientific, technology, ecological, economic and social spheres in recent years. Rice husk (RH) is a by-product of rice milling and rice husk ash (RHA) is generated by combustion in a separate boiler. Both RH and RHA are abundantly accessible in rice growing countries such as China, India, Brazil, the USA, and Southeast Asia. RH has therefore been recycled by burning it for energy production. This generates RHA, which contains a huge quantity (85-95%) of amorphous silica. Over the past two decades, RHA has been used extensively in numerous fields for manufacturing of different silicates, zeolites, catalysts, nanocomposite, cement, lightweight construction materials, insulators, and adsorbents. This paper presents a comprehensive overview on the processing of nano-silica from RH/RHA. It tries at the same time, to present a critical review of the application of RHA as an ingredient for the production of various ceramic materials, e.g. refractory, glass, whiteware, oxide and non-oxide ceramics, silica aerogel and SiO 2 /C composites. In summary, amorphous silica derived from RHA or RH provides a potential alternative to conventional silica sources (e.g. quartz) for the manufacture of value-added ceramics for practical applications.

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Section: Chemical Methodsmentioning

confidence: 99%

Rice husk/rice husk ash as an alternative source of silica in ceramics: A review

Hossain

Mathur

Roy

2018

Journal of Asian Ceramic Societies

279

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“…The same authors also reported that efficiency of removal of impurities diminished with increase in HCl acid concentration. For alkaline‐SiO 2 separation process, NaOH was mostly preferred for extraction of silica with purity level above 95% . However, due to high cost of NaOH, few researchers have used carbonate like Na 2 CO 3 for extraction of silica from RHA and found comparative results .…”

Section: Introductionmentioning

confidence: 99%

“…For alkaline-SiO 2 separation process, NaOH was mostly preferred for extraction of silica with purity level above 95%. 9,17,18 However, due to high cost of NaOH, few researchers have used carbonate like Na 2 CO 3 for extraction of silica from RHA and found comparative results. 19,20 Although there are several articles available on yield, purity, and properties of silica nanoparticles extracted from RHA using NaOH, no literature has been reported on yield, purity, and properties of silica when extracted using KOH and K 2 CO 3 .…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment of chemical treatments on extraction potential of commercial grade silica from rice husk

Nayak

Nandi

Datta

2019

Engineering Reports

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In the present study, an attempt has been made to extract commercial grade amorphous silica nanoparticles from rice husk (RH) using four different chemicals (NaOH, KOH, Na2CO3, and K2CO3) and two washing solvents (water and ethanol). The elemental, structural, and morphological characterizations of the silica samples were carried out using scanning electron microscopy coupled with energy‐dispersive X‐ray spectroscopy (SEM‐EDS), atomic absorption spectrometry (AAS), X‐ray diffraction (XRD), and Fourier‐transform infrared spectroscopy (FTIR). The combined NaOH and water treatment was found to be the most efficient method in terms of recovery of silica sample, while combined Na2CO3 and water treatment was more suitable for obtaining pure silica. No significant difference in the percentage recovery of silica was observed between the two washing treatments at p < 0.05. Scanning electron micrographs of the Na2CO3‐cum‐water and K2CO3‐cum‐water treated samples showed nonagglomerated silica nanoparticles. The XRD analysis of silica obtained from these two treatments was also free from any sharp peaks illustrating pure amorphous structure of silica. EDS and AAS study of K2CO3‐cum‐water treated samples showed higher mineral impurities compared to Na2CO3‐cum‐water treated sample. It could be inferred that silica obtained from Na2CO3 and water washing treatment can be used for extraction of metallurgical grade silicon.

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“…Hal ini disebabkan karena sintesis silika dengan metode ini dapat mempermudah pengendalian ukuran partikel dan dan bentuk dengan mengatur kondisi sintesisnya. Proses sol-gel memperkenankan sintesis dari nanopartikel silika dengan reaksi hidrolisis dan kondensasi pada alkoksida dengan adanya alkohol agar menyediakan regulasi yang lebih dari reaksi kinetic [2].…”

Section: Pendahuluanunclassified

“…Terdapat dua metode dalam pembuatan NASICON ini, yaitu metode Solid-State, yaitu padatan kristalin yang disintesis secara langsung dari pereaksi-pereaksinya yang berwujud padat dan metode Sol-Gel yaitu larutan yang mengalami perubahan fase menjadi sol, kemudian menjadi gel [2]. Metode sol-gel dipilih dalam sintesis ini karena kebutuhan bahan pembuatan yang lebih murah dan mudah, membutuhkan temperatur yang tidak terlalu tinggi serta material yang diperoleh lebih padat dan lebih homogen [4].…”

Section: Pendahuluanunclassified

Pengaruh Temperatur Sintering pada Pembentukan Fasa Natrium Super Ionic Conductor (NASICON) Na1+xZr2SixP3-xO12 (x=2) dan Sifat Konduktifitas Ionik Elektrolit Padat

Abdurrachim

Purwaningsih

Pratiwi

2016

JTITS

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Penanganan limbah sekam padi saat ini umumnya ingin memanfaatkan kandungan Silika (SiO2) pada sekam padi yang telah dibakar (abu sekam padi). Kandungan silika yang diperoleh dapat dimanfaatkan dalam pembuatan material inovatif seperti Natrium Super Ionic Conductor (NASICON). Pada penelitian ini, pembentukan NASICON menggunakan metode sol-gel dari, Na2SiO3, H3PO4 dan ZrOCl.8H2O dengan variasi temperatur sintering yakni 900 o C, 1000 o C dan 1100 o C. Pengujian SEM, XRD, FTIR, dan LRC dilakukan untuk mengetahui fasa, struktur, gugus fungsi, dan konduktifitas yang dimilikinya. Dari hasil pengujian diketahui bahwa fasa NASICON yang paling baik diperoleh pada temperatur 900 o C yaitu Na3Zr2Si2PO12 , kemudian nilai konduktivitas ionik tertinggi juga diperoleh pada NASICON dengan temperatur 900 o C sebesar 0,241x10-6 S/cm.

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Towards tunable size of silica particles from rice husk

Cited by 51 publications

References 29 publications

Rice husk/rice husk ash as an alternative source of silica in ceramics: A review

Rice husk/rice husk ash as an alternative source of silica in ceramics: A review

Comparative assessment of chemical treatments on extraction potential of commercial grade silica from rice husk

Pengaruh Temperatur Sintering pada Pembentukan Fasa Natrium Super Ionic Conductor (NASICON) Na1+xZr2SixP3-xO12 (x=2) dan Sifat Konduktifitas Ionik Elektrolit Padat

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