Coating of L-Arginine Modified Silica on Magnetite through Two Different  Sol-Gel Routes

Amaria, Amaria; Suyanta, Suyanta; Nuryono, Nuryono

doi:10.22146/ijc.22521

Cited by 4 publications

(7 citation statements)

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“…42 The peaks observed between 1100-900 cm −1 indicate the presence of Si-O-Si vibrations in the structure GPTMS and APTES molecules. 43 Absorption bands at approximately 1250 and 912 cm −1 in 3 (see Figure 5(a)) are ascribed to the symmetric and asymmetric stretching vibration of the C-O-C the epoxy ring of GPTMS 44 while the bands at 1020 cm −1 were attributed to the Si-O stretching vibration in APTES found on the magnetic NPs. 41 The absorption bands at 1563.56 and 1499.12 cm −1 may be ascribed to N-H vibrations from amino groups on APTES.…”

Section: Modification Of Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Baghdadi

Youssef

Bouhadir

et al. 2021

J of Applied Polymer Sci

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Epoxy polymers, having good mechanical properties and thermal stability, are often used for engineering applications. Their properties can be further enhanced by the addition of iron oxide (Fe3O4) nanoparticles (NPs) as fillers to the resin. In this study, pristine Fe3O4 NPs were functionalized with polydopamine (PDA), (3‐glycidoxypropyl)trimethoxysilane (GPTMS), and (3‐aminopropyl)trimethoxysilane (APTES). X‐ray diffraction and scanning electron microscopy (SEM) were used to study any changes in the crystal structure and size of the NPs while Fourier‐Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA) were used to ensure the presence of functional groups on the surface. The mechanical properties of the Fe3O4‐based nanocomposites generally improved except when reinforced with Fe3O4/PDA. The maximum improvement in tensile strength (∼34%) and fracture toughness (∼13%) were observed for pristine Fe3O4‐based nanocomposites. Dynamic mechanical analysis (DMA) showed that the use of any of the treated NPs improved the material's initial storage modulus and had a substantial impact on its dissipation potential. Also, it was observed that the glass transition temperature measurements by DMA and differential scanning calorimetry were below that of pure epoxy. SEM of the cracked surfaces shows that the incorporation of any NPs leads to an enhancement in its thermal and mechanical properties.

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Section: Modification Of Fe 3 O 4 Nanoparticlesmentioning

confidence: 99%

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Baghdadi

Youssef

Bouhadir

et al. 2021

J of Applied Polymer Sci

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“…Hal ini dimungkinkan karena nilai keelektronegatifan dari atom O pada gugus silanol (≡Si-OH) dan siloksan (≡Si-O-Si≡) akan berpotensi berikatan kovalen dengan ion logam sehingga proses adsorpsi secara kimia dapat berlangsung. Hasil ini juga sesuai dengan penelian sebelumnya yang dilakukan oleh Nuryono [19] bahwa pengadsorpsian ion logam menggunakan adsorbsen silika paramagnetik mengikuti model kinetika pseudo orde 2…”

Section: Kinetika Adsorpsiunclassified

“…Selain adanya gugus silanol (≡Si-OH) dan siloksan (≡Si-O-Si≡), kemampuan adsorpsi silika gel dapat ditingkatkan dengan memberi sifat magnetik dengan penambahan Fe 3 O 4 . Adsorben yang memiliki sifat magnetik baru-baru ini mendapat banyak perhatian dalam pengaplikasiannya untuk mengurangi ion logam berat dari air limbah [19]. Kemampuan menyerap Fe 3 O 4 berdasarkan sifat senyawa tersebut sebagai paramagnetik dengan gaya magnet yang dihasilkannya dan merupakan oksida besi yang memiliki energi permukaan yang tinggi sehingga mampu mengikat logam.…”

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“…Kemampuan menyerap Fe 3 O 4 berdasarkan sifat senyawa tersebut sebagai paramagnetik dengan gaya magnet yang dihasilkannya dan merupakan oksida besi yang memiliki energi permukaan yang tinggi sehingga mampu mengikat logam. Nuryono dkk [19] mengadsorpsi multilogam Au(III), Cu(II) dan, Ni(II) dengan menggunakan magnetit yang dilapisi silika. Namun, kemampuan silika paramagnetik belum pernah dilakukan terhadap logam Ag [20][21].…”

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“…Berdasarkan uraian tersebut, maka penelitian mengenai sintesis silika paramagnetik dari abu sekam padi sebagai adsorben logam berat Ag(I) penting untuk dilakukan. Penambahan material magnetit pada adsorben bertujuan agar sifat paramagnetik yang dimiliki oleh magnetit dapat mengefektifkan penyerapan logam [19]. Material Fe 3 O 4 yang telah dilapisi dengan silika tersebut kemudian dikarakterisasi dengan FTIR dan XRD dan diaplikasikan untuk mempelajari sifat adsorpsi pada limbah logam berat Ag(I).…”

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Thermodynamics and Kinetics of Adoption of Ag (I) on Paramagnetic Silica Rice Husk Ash Surface

2019

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Synthesis of paramagnetic silica from rice husk ash has been carried out as an adsorbent for heavy metal Ag (I). This study tried to synthesis and characterized the thermodynamics and kinetics behaviour of paramagnetic silica from the husk ash as metal adsorbent Ag (I). Determination of optimal conditions for adsorption of metal ions Ag (I) is carried out by varying the pH, concentration, and contact time of the adsorbent. The results showed that the optimum pH was at pH 3, optimal concentration Ag(I) of 350 ppm and optimal contact time of 90 minutes. At optimal conditions, paramagnetic silica adsorption capacity for metal ion Ag (I) is 323.62 mg/g. The isotherm model that is suitable for paramagnetic silica is the Freundlich isotherm model. The kinetic model that is suitable for paramagnetic silica is the Pseudo Order 2 kinetic model.

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Coating of mercapto modified silica on iron sand magnetic material for Au(III) adsorption in aqueous solution

Karbeka¹,

Nuryono

Suyanta

2020

IOP Conf. Ser.: Mater. Sci. Eng.

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The functionalized silica coating mercapto on iron sand magnetic material (MM/SiO2/MBI)has been done through sol-gel process. The successfully synthesized material is used as adsorbent (MM/SiO2/MBI) in the Adsorpi Au (III) process. Material characterization is carried out with an adsorbent stability test against acids. Adsorption is performed in a batch system and the unadsorped Au (III) ion is analyzed with the Atomic Absorption Spectrophotometer (AAS). Characterization results indicate the synthesis of PB/SiO2-MBI adsorbent has been successfully performed. The coating of iron sand magnetic material enhances stability to acid. ADsorbent (MM/SiO2/MBI) is capable of adjudisorate ion Au (III) with the highest adsorption occurring at pH 1. Kinetics review indicates that the adsorption of the ion (III) is following the second-order pseudo kinetics with a value of k 3.57 × 10-3 g/mg. Minute and adsorption isotherm follows the isotherm pattern of Langmuir with an adsorption capacity of 125 mg/g.

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Coating of L-Arginine Modified Silica on Magnetite through Two Different Sol-Gel Routes

Abstract: In this research, magnetite coated with L-arginine modified silica (Fe 3 O 4 /SiO 2 -GPTMS-Arg) has been synthesized through a sol-gel process at a room temperature in two

Cited by 4 publications

References 28 publications

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Thermal and mechanical properties of epoxy resin reinforced with modified iron oxide nanoparticles

Thermodynamics and Kinetics of Adoption of Ag (I) on Paramagnetic Silica Rice Husk Ash Surface

Coating of mercapto modified silica on iron sand magnetic material for Au(III) adsorption in aqueous solution

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