Synthesis of mesoporous silica with controlled pore structure from bagasse ash as a silica source

Rahman, Nanik Astuti; Widhiana, Ika; Juliastuti, Sri Rachmania; Setyawan, Heru

doi:10.1016/j.colsurfa.2015.03.018

Cited by 68 publications

(31 citation statements)

References 25 publications

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“…The bands are metal-oxygen bands that correspond to the intrinsic stretching frequencies of the tetrahedral and octahedral sites, respectively, of the inverse cubic spinel of Fe3O4 [27,31]. For samples Si150-MNP and Si200-MNP, other bands (1080, 996 and 624 cm -1 ) that can be attributed to Si-O-Si and Si-O stretching corresponding to SiO2 appear [32,33]. Moreover, the band at 561 cm -1 is possibly due to the Fe−O−Si stretching vibrations caused by perturbation of the metallic ion in SiO4 [27].…”

Section: Adsorption Kinetic Experimentsmentioning

confidence: 99%

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

Setyawan

Widiyastuti

Mahmudi

et al. 2018

J. Pow. Tech. Adv. Funct. Mater.

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Abstract:In this paper, the synthesis of silica-coated magnetite nanoparticles using a one-step electrochemical method and their application for dye removal are presented. In this method, pure iron in a dilute aqueous sodium silicate solution that served as a silica precursor was electro-oxidized. The silica-coated magnetite nanoparticles produced by this method is nearly spherical with the size of approximately 10 nm and follows the spinel structure of Fe3O4. The silica-coated magnetite nanoparticles exhibit nearly superparamagnetic properties and excellent performance to remove methylene blue from wastewater. The adsorption capacity of the nanoparticles was approximately 24.2 mg methylene blue/g adsorbent, which was much higher than that of pure magnetite nanoparticles (1.1 mg methylene blue/g adsorbent). Also, the percentage removal was higher than 90% with the initial concentration of methylene blue up to 40 mg/L. It can be regenerated and reused with an only slight reduction in percentage removal.

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Section: Adsorption Kinetic Experimentsmentioning

confidence: 99%

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

Setyawan

Widiyastuti

Mahmudi

et al. 2018

J. Pow. Tech. Adv. Funct. Mater.

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“…Silika di alam dapat diperoleh dari mineral dan bahan nabati. Penelitian tentang silika yang diperoleh dari bahan nabati telah dilakukan oleh Rafiee et al, 2012 yang mendapatkan nanosilika dari sekam padi dan Rahman et al, 2015 yang mendapatkan silika mesopori dari abu ampas tebu.…”

Section: Pendahuluanunclassified

Silika pada Togkol Jagung yang Dikarakterisasi Menggunakan Spektroskopi Infra Merah dan Difraksi Sinar-X

Wardhani¹

2017

JKR

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AbstrakPenelitian ini dilakukan untuk mengisolasi silika pada tongkol jagung menggunakan HCl dengan variasi suhu perendaman. Silika yang diperoleh dikarakterisasi ikatan dan strukturnya menggunakan spektroskopi infra merah dan difraksi sinar-X. Silika dari serbuk tongkol jagung diperoleh dengan cara nontermal melalui perendaman dengan HCl pada suhu kamar dan suhu 60˚C selama 3 jam dan cara termal melalui pembakaran pada suhu 800˚C. Silika yang diperoleh dikarakterisasi ikatannya dan diperoleh pita serapan karakteristik silika muncul pada bilangan gelombang 1101, 794, dan 468 cm -1 . Struktur silika yang dikarakterisasi menggunakan difraktometer sinar-X menunjukkan fase amorf silika pada 2θ = 21 -25 ᵒ dan mulai terbentuk fase kristalin pada 2θ = 26 ᵒ . Kata kunci: Silika pada tongkol jagung, spektroskopi infra merah, difraksi sinar-X AbstractThis study was conducted to isolate the silica on a corn cob using HCl with soaking temperature variation. The silica was characterized bonding and structure using infrared spectroscopy and X-ray diffraction. Silica of corn cob powder obtained by nontermal through immersion with HCl at room temperature and at 60 ᵒ C for 3 hours and thermal way through burning at 800 ᵒ C. The silica was characterized bondage and obtained an absorption band characteristic of silica appears at wave number 1101, 794, and 468 cm -1 . Silica structure characterized using X-ray diffraction that showed the amorphous phase silica 2θ˚ = 21 -25 ᵒ and begin to form the crystalline phase in 2θ˚ = 26 ᵒ .

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“…During this step, the template must be removed as completely as possible while preserving the templated silica structure. To date, compared to the other template removal methods, calcination [15,18,21] and solvothermal extraction [12,22] are the most favored because of their simplicity and low costs. Calcination at a high temperature tends to cause sintering, a densification of pore structures and a loss of mesostructure.…”

Section: Introductionmentioning

confidence: 99%

PEG-templated mesoporous silicas using silicate precursor and their applications in desiccant dehumidification cooling systems

Setyawan

Yuwana

Balgis

2015

Microporous and Mesoporous Materials

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Synthesis of mesoporous silica with controlled pore structure from bagasse ash as a silica source

Cited by 68 publications

References 25 publications

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

Silica-coated magnetite nanoparticles prepared by the one-step electrochemical method for dye removal

Silika pada Togkol Jagung yang Dikarakterisasi Menggunakan Spektroskopi Infra Merah dan Difraksi Sinar-X

PEG-templated mesoporous silicas using silicate precursor and their applications in desiccant dehumidification cooling systems

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