Preparation and Characterization of Silica Gel from Wheat Straw

Patel, Khushbu; Misra, Nirendra M.; Shettigar, Rakshith R.

doi:10.18178/ijcea.2016.7.5.603

Cited by 10 publications

(12 citation statements)

References 19 publications

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“…The sol gel technique mainly used for extracting silica from agricultural material like rice husk [6], sugar cane bagasse [7][8], wheat husk [9], corn cob [10], and wheat staw [11]. The sol-gel process is widely used to produce pure silica particles due to its ability to control the particle size, size distribution and morphology through systematic monitoring of reaction parameters [12].…”

Section: Introductionmentioning

confidence: 99%

Silicon Conversion From Bamboo Leaf Silica By Magnesiothermic Reduction for Development of Li-ion Baterry Anode

Silviana

Bayu

2018

MATEC Web Conf.

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Silicon (Si) is a promising alternative material for the anode Lithium ion Battery (LIB). Si has a large theoretical capacity about 3579 mA hg-1, ten times greater than the commercial graphite anode (372 mA hg-1). Bamboo is a source of organic silica (bio-silica). Most part biogenetic content of SiO2 is obtained in bamboo leaves. This paper aims to investigate the synthesis nano Si from bamboo leaves through magnesiothermic reduction after silica extraction using sol–gel method and to observe nano Si of bamboo leaf as mixed material for lithium ion baterry. Silica and silicon content was determined using XRF. Silica product has 96,3 wt. % yield of extraction from bamboo leaf, while silicon yield was obtained 61.2 wt. %. The XRD pattern revealed that silica and silicon product were amourphous. The extracted silica and silicon from bambo leaf has spherical shape and agglomerated form. As anoda material for LIB, silicon product achieved 0,002 mAh capacity for 22 cycle.

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Section: Introductionmentioning

confidence: 99%

Silicon Conversion From Bamboo Leaf Silica By Magnesiothermic Reduction for Development of Li-ion Baterry Anode

Silviana

Bayu

2018

MATEC Web Conf.

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“…Silika gel memiliki berat molekul besar dan banyak menyerap air sehingga berbentuk padat kenyal. Silika gel disebut juga silika amorf yang terdiri atas globula-globula SiO4 tetrahedral yang tidak teratur dan beragregat membentuk kerangka tiga dimensi [10] Mengingat begitu banyak manfaat yang dapat diambil dari unsur silika, maka pada penelitian kali ini akan dilakukan ekstraksi silika menggunakan metode yang telah dilakukan sebelumnya oleh Ginanjar [16] dengan sampel yang berbeda yaitu abu vulkanik gunung sinabung. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh konsentrasi HCl pada larutan silika gel yang dihasilkan dan mengetahui daya penyerapan dari silika gel dengan menggunakan logam Cu (II)…”

Section: Pendahuluanunclassified

“…Padatan ini berdasarkan diameter partikelnya terbagi atas debu vulkan (< 0.26 mm) yang berupa bahan halus, pasir (0.25 -4 mm) yang berbentuk tumpul, lapilli atau 'little stone' (4 -32 cm) yang berbentuk bulat hingga persegi dan bom (> 32 mm) yang bertekstur kasar [2] Mineral yang paling banyak dalam magma ialah silika (SiO2) dan oksigen [14] Tabel 1. Jenis-jenis mineral dalam abu vulkanik Gunung Sinabung [ Silika gel adalah senyawa hasil polimerisasi asam silikat yang tersusun secara tidak teratur dari globula -globula rantai satuan SiO4 tetrahedral dan beragregasi membentuk kerangka tiga dimensi yang lebih besar (sekitar 1 -25 μm) [10] Rumus kimia silika gel secara umum adalah SiO2.xH2O. Menurut Oscik (1982), struktur satuan mineral silika gel pada dasarnya mengandung kation Si 4+ yang terkoordinasi secara tetrahedral dengan anion O 2-, namun susunan SiO4 pada silika gel tidak beraturan seperti terlihat pada gambar 1 [9] Gambar 1.…”

Section: Teoriunclassified

Ekstraksi Abu Vulkanik Gunung Sinabung Untuk Menghasilkan Silika Gel

2017

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AbstrakSilika gel merupakan salah satu material berbasis silika. Penelitian ini bertujuan untuk memanfaatkan abu vulkanik Gunung Sinabung menjadi silika gel dengan metode ekstraksi. Abu vulkanik diekstraksi dengan NaOH 4M dengan variasi waktu 30 menit, 60 menit, 90 menit dan 120 menit. Untuk pembentukan gel dilakukan dengan penambahan HCl dengan variasi konsentrasi 4M, 6M dan 8M. Karateristik dan analisa yang dilakukan pada penelitian ini ialah dengan FTIR, SEM-EDX, XRD, gravimetri dan AAS. Pada analisa larutan natrium silika dengan variasi waktu diperoleh kandungan silika tertinggi terdapat pada waktu ekstraksi 120 menit. Berdasarkan hasil karateristik dengan FTIR menunjukkan adanya gugus Si pada abu vulkanik dan adanya gugus Si-O-Si yang berhasil dibuat dari ekstraksi abu vulkanik. Berdasarkan hasil karateristik dengan SEM-EDX diperoleh bahwa kandungan silika pada silika gel dari abu vulkanik Gunung Sinabung sebesar 51,96%. Berdasarkan hasil karateristik dengan XRD menunjukkan bahwa ukuran diameter silika sebesar 33,412 nm dan kristanilitas yang dimiliki sebesar 89%. Pengaplikasian dari silika dilakukan pada adsorpsi logam Cu (II) dengan menggunakan AAS, dimana diperoleh daya penjerapan terbesar sebayak 130,725 mg/g dengan efisiensi penjerapan sebesar 98,66%. Kata kunci : Silika gel, abu vulkanik, ekstraksi, adsorpsiAbstract Silica gel is one of the silica based material. This research aimed to utilizetion volcanic ash of Sinabung mountains to make silica gel by extraction method. Volcanic ash was extracted using NaOH 4M for 30, 60, 190 and 120 minutes. Gel was formed by addip HCl 4, 6,and 8M. Sample were analyzed of using FTIR, SEM-EDX, gravimetri and AAS. Analysis silica sodium solution with concentration variation showed the biggest silica was 120 minutes. FTIR result indicated the presence of Si in volcanic ash and siloxane (Si-O-Si). SEM-EDX result silica content of silica gel was 51.96%. XRD result showed that diameter of silica was 33.412 nm and the crystallinity was 89%. Silica was applied on the largest Cu (II) absorption rate was130.725 mg/g with an adsorption efficiency of 98.66%.

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“…Biomass can be a potential source for the extraction of synthetic silica components such as silica gel. In such a way, biomass resources ash of rice husk [5], sorghum bagasse [6], tef straw [7], maize leaves [8], rice straw [9], wheat straw [10], sugarcane bagasse [11], sugarcane leaf [12], bamboo leaf [13] corn cob [14], and palm [1] are found to be potential feedstock. Sodium silicate is used in general to extract the silica from the residual ash of the feedstock [15].…”

Section: Introductionmentioning

confidence: 99%

“…However, high-temperature calcination that reaches up to 1710 °C is found to be one of the major drawbacks for silica gel production in the traditional existing methods [3,49]. Hightemperature reaction leads to energy-intensive process that has an adverse efect on developing an economically sustainable process for silica gel production and its marketing as well [10]. Te conventional methods of producing silica gel limit its use in situations where product purity is not compromised because they contain contaminants such as heavy metals [6].…”

Section: Introductionmentioning

confidence: 99%

An Overview of Current and Prognostic Trends on Synthesis, Characterization, and Applications of Biobased Silica

Tessema

Gonfa

Hailegiorgis

et al. 2023

Advances in Materials Science and Engineering

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Silica has shown numerous applications in different fields such as environmental, biomedical, agriculture, and even in chemical processing. However, due to high energy-intensive and cost-effective issues, researchers show interest to replace the conventional methods with biobased environmentally-friendly techniques for biosilica production from renewable biomass sources. Generally, silica is found to be available in amorphous and crystalline structures. For commercial purposes, silica is produced from alkyl orthosilicates ore that consists of polyethlydiorthosilicate, tetraethyl ortothosilicate, and tetramethyl orthosilicate. Another form of silica, silica gel, is produced from the selected resources of biomass, such as palm tree, wheat straw, maize leaves, teff straw, sugarcane bagasse, rice husk, rice straw, sugarcane leaf, oat husk, bamboo leaf, and corn cob. The production of biobased silica gel from agricultural residues is found to be a sustainable which receives a significant attention that can be replaced with inorganic-based silica gel for environmental concerns. Based on this context, there is a huge look for developing a process to produce biobased silica and silica gel from biomass resources with low energy utilization as promising alternatives to conventional methods. Keeping in view, current trends and methods for synthesis, the characterization of biobased silica and silica gel, as well as its wide prognostic applications were focused on a comprehensive review.

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Preparation and Characterization of Silica Gel from Wheat Straw

Cited by 10 publications

References 19 publications

Silicon Conversion From Bamboo Leaf Silica By Magnesiothermic Reduction for Development of Li-ion Baterry Anode

Silicon Conversion From Bamboo Leaf Silica By Magnesiothermic Reduction for Development of Li-ion Baterry Anode

Ekstraksi Abu Vulkanik Gunung Sinabung Untuk Menghasilkan Silika Gel

An Overview of Current and Prognostic Trends on Synthesis, Characterization, and Applications of Biobased Silica

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