Preparation of Aniline Dimer-COOH Modified Magnetite (Fe3O4) Nanoparticles by Ultrasonic Dispersion Method

Taka, Zakiyyu Ibrahim; Mustafa, Mohd Kamarulzaki; Asman, Saliza; Sekak, Khairunnadim Ahmad; Muhammada, Jibrin

doi:10.14419/ijet.v7i4.30.22108

Cited by 6 publications

(3 citation statements)

References 18 publications

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“…The overlap between these two peaks could result in a broader, yet less sharp, peak at 1600-1800 cm −1 . The bands between 1650 and 1710 cm −1 in both structures were attributed to the stretching vibrations of carboxylic groups (C=O-O), indicating that the aniline oligomers were carboxyl-capped [45]. Moreover, the C-N stretching of the secondary aromatic amine (1307 cm −1 in the CAT spectrum and 1311 cm −1 in the CAP spectrum), together with the weaker peaks at about 1250 and 1420 cm −1 , were indicative of the emeraldine salt state of the oligoanilines.…”

Section: Characterization Of the Synthesized Oligoanilinesmentioning

confidence: 99%

In-Out Surface Modification of Halloysite Nanotubes (HNTs) for Excellent Cure of Epoxy: Chemistry and Kinetics Modeling

et al. 2021

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In-out surface modification of halloysite nanotubes (HNTs) has been successfully performed by taking advantage of 8-hydroxyquinolines in the lumen of HNTs and precisely synthesized aniline oligomers (AO) of different lengths (tri- and pentamer) anchored on the external surface of the HNTs. Several analyses, including FTIR, H-NMR, TGA, UV-visible spectroscopy, and SEM, were used to establish the nature of the HNTs’ surface engineering. Nanoparticles were incorporated into epoxy resin at 0.1 wt.% loading for investigation of the contribution of surface chemistry to epoxy cure behavior and kinetics. Nonisothermal differential scanning calorimetry (DSC) data were fed into home-written MATLAB codes, and isoconversional approaches were used to determine the apparent activation energy (Eα) as a function of the extent of cure reaction (α). Compared to pristine HNTs, AO-HNTs facilitated the densification of an epoxy network. Pentamer AO-HNTs with longer arms promoted an Excellent cure; with an Eα value that was 14% lower in the presence of this additive than for neat epoxy, demonstrating an enhanced cross-linking. The model also predicted a triplet of cure (m, n, and ln A) for autocatalytic reaction order, non-catalytic reaction order, and pre-exponential factor, respectively, by the Arrhenius equation. The enhanced autocatalytic reaction in AO-HNTs/epoxy was reflected in a significant rise in the value of m, from 0.11 to 0.28. Kinetic models reliably predict the cure footprint suggested by DSC measurements.

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Section: Characterization Of the Synthesized Oligoanilinesmentioning

confidence: 99%

In-Out Surface Modification of Halloysite Nanotubes (HNTs) for Excellent Cure of Epoxy: Chemistry and Kinetics Modeling

et al. 2021

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“…Synthesis using the sol-gel method can also maintain uniformity of size and crystallinity, which is essential for its application in battery electrode materials (Rasheed et al, 2018). Moreover, compared with other synthesis methods, the sol-gel synthesis method is more advantageous due to its low cost, suitable homogeneity, and high purity (Takai et al, 2019). This method also makes it possible to synthesize materials with any oxide composition, even new organic and inorganic materials that do not exist naturally (Pierre, 2020).…”

Section: Introductionmentioning

confidence: 99%

Development of an Enrichment Book with Hematite as a Battery Electrode in Renewable Energy Learning

Rosyidi,

Suharno,

Harjunowibowo

2024

JMPF

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Learning innovation is needed to maximize interaction between teachers and students so that learning is much more effective and efficient, one of which is through enrichment books so that students learn not only theory but also its application. Enrichment books were developed to enrich students' knowledge. In this research, an enrichment book will be created using hematite as a battery electrode in renewable energy learning. The aim of this research is to determine the development and feasibility of enrichment books using hematite as battery electrodes in renewable energy learning. Enrichment books are an innovation in education that was developed to enrich information that is not obtained from textbooks. The method used in this research is R&D. The research was carried out using the ADDIE model, but this research was limited to the development stage. The enrichment book was developed using the Canva application. The data collection technique was carried out using a purposive sampling technique. The enrichment book that has been created is validated by distributing questionnaires to expert validators and practitioner validators. The research was conducted at three schools in the Greater Solo area, namely S MA N Kebakkramat, MA Al Madinah Nogosari, and SMK Batik 2 Surakarta. The results obtained show that the enrichment book with hematite as a battery electrode can be applied in physics learning on renewable energy materials with a validation score of 68.41 or perfect criteria. This research can be the basis for developing enrichment books using hematite as battery electrodes in Renewable Energy learning.

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“…The biological methods [ 17 ] are of low cost but relatively slow [ 14 , 16 ]. The chemical methods, such as coprecipitation [ 18 – 20 ], sol-gel synthesis [ 21 – 23 ], template-assisted synthesis [ 24 ], reverse micelle [ 25 ], hydrothermal [ 26 ], solvothermal [ 27 ], sonochemical [ 28 , 29 ], combustion synthesis [ 30 – 34 ], electrodeposition [ 35 ], and pyrolysis [ 36 ] are of low cost and high yield products in which size, composition and the shape of nanoparticles can be controlled [ 14 , 16 ]. Among these chemical methods, the coprecipitation is an easy and rapid procedure at low temperatures (<100 °C).…”

Section: Introductionmentioning

confidence: 99%

A facile approach for the synthesis of porous hematite and magnetite nanoparticles through sol-gel self-combustion

2021

Turk J Chem

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Porous magnetite (Fe 3 O 4 ) and hematite (α-Fe 2 O 3 ) nanoparticles were prepared via the sol-gel auto combustion method. The gels were prepared by reacting ferric nitrates (as oxidants) with starch (as fuel) at an elevated temperature of 200°C. Different ratios (Φ) of ferric nitrates to starch were used for the synthesis (Φ = Fuel/Oxidant). The synthesized iron oxides were characterized by Fourier transform-infrared (FT-IR) spectroscopy, Raman spectroscopy, X-ray diffraction (XRD) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmet-Teller (BET) and vibrating sample magnetometer (VSM) analysis techniques.The crystal structure, morphology, and specific surface area of the iron oxide nanoparticles (Fe 3 O 4 and α-Fe 2 O 3 ) were found to be dependent on the starch content.The FT-IR, XRD and VSM analysis of the iron oxides for Φ = 0.3 and 0.7 confirmed the formation of the α-Fe 2 O 3 core, whereas at Φ = 1, 1.7, and 2 showed that Fe 3 O 4 cores were formed with the highest saturation magnetization of 60.36 emu/g at Φ = 1. The morphology of the Fe 3 O 4 nanoparticles exhibited a quasi-spherical shape, while α-Fe 2 O 3 nanoparticles appeared polygonal and formed clusters. The highest specific surface area was found to be 48 m 2 g -1 for Φ = 1.7 owing to the rapid thermal decomposition process. Type II and type III isotherms indicated mesoporous structures.

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Preparation of Aniline Dimer-COOH Modified Magnetite (Fe3O4) Nanoparticles by Ultrasonic Dispersion Method

Cited by 6 publications

References 18 publications

In-Out Surface Modification of Halloysite Nanotubes (HNTs) for Excellent Cure of Epoxy: Chemistry and Kinetics Modeling

In-Out Surface Modification of Halloysite Nanotubes (HNTs) for Excellent Cure of Epoxy: Chemistry and Kinetics Modeling

Development of an Enrichment Book with Hematite as a Battery Electrode in Renewable Energy Learning

A facile approach for the synthesis of porous hematite and magnetite nanoparticles through sol-gel self-combustion

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