The Modification of Carbon with Iron Oxide Synthesized in Electrolysis Using the Arc Discharge Method

Saraswati, Teguh Endah; Prasiwi, Oktaviana Dewi Indah; Masykur, Abu; Handayani, Nestri; Anwar, Miftahul

doi:10.1088/1757-899x/176/1/012046

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…The XRD profiles of the Fe 3 O 4 /carbon catalyst, prepared in submerged arc discharge, and com-CNT synthesized in three different conditions are shown in Figures 2(b) through 2(e). The structure and properties of the prepared catalyst were discussed in our previous publication [36,38]. Figures 2(c) through 2(e) show the XRD profiles of the CNT produced in different pressure and gas conditions: 80 Torr and 100 Torr, without atmospheric air addition; 180 Torr, with atmospheric air addition.…”

Section: Resultsmentioning

confidence: 99%

“…The materials used in this experiment were a nanocomposite of Fe 3 O 4 /carbon catalyst in size of ~20 nm, prepared by submerged arc discharge [36]; distilled water; ethanol (99%) (Merck); graphite powder (Merck); commercial silica binder; and carbon electrodes (Qingdao Tennry Carbon Co., Ltd.). The gas used in this experiment was N 2 gas (PT.…”

Section: Experimental Methods Materialsmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of Magnetic Composite of Iron Compounds/Carbon Nanotubes in Chemical Vapor Deposition

Saraswati

Prasiwi²,

Masykur³

et al. 2019

jsmi

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The chemical vapor deposition (CVD) synthesis of magnetic carbon nanotubes (mCNT) using carbon dioxide/carbon catalyst has been successfully carried out in various pressures. The temperatures were set at 800° C for 10 minutes reaction time. Nitrogen (N2) gas in 20 Torr was flown in followed by ethanol vapor until the final pressure reached 80 and 100 Torr without added air, and 180 Torr with added air. The formation of mCNT was confirmed by shifted X-ray diffraction (XRD) peak of graphite from 26.53° to 25.53° which were highly considered to the other carbon allotropes with sp2 hybridized carbon atom hybridization structures. The higher pressure with added atmospheric air led to the excessive oxidation which influenced the growth of mCNT. Transmission electron microscopy (TEM) analysis observed mCNT filled by catalyst particles which suggested as magnetic phase induced the magnetic property of mCNT. The best electrical conductivity performance (lower electrical resistance) was owned by mCNT produced in the lower pressure condition with no air added.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Methods Materialsmentioning

confidence: 99%

Synthesis of Magnetic Composite of Iron Compounds/Carbon Nanotubes in Chemical Vapor Deposition

Saraswati

Prasiwi²,

Masykur³

et al. 2019

jsmi

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“…The experimental part of this research involved the production of a thermite using Fe 2 O 3 and Al that was used to manufacture the exothermic sleeve (Neu & Gough, 1993;Mei, Halldearn, & Xiao, 1999;Menon, 2000;Miki, 2002;Saraswati et al, 2017;Wiencke et al, 2018). The materials were obtained from local distributors.…”

Section: Methodsmentioning

confidence: 99%

Study on the Effects of Size-Shape Parameter Variation of Exothermic Riser Sleeves and Its Influence on Temperature Dependent Parameters

Sotomayor,

Carpio,

Díaz

2024

International Journal of Manufacturing, Materials, and Mechanical Engineering

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Using exothermic sleeves allows to reduce the volume of the risers required in the casting of ferrous alloys, as well as the amount of metal used, and the costs involved. In this work, flat plates of nodular iron were casted and the effects of the shape and size of the risers were analyzed. For this purpose, risers with two configurations (with and without exothermic sleeves), three shapes (cylindrical, spherical, oval), and two relative sizes (100% volume and 60% volume) were considered. The mixture that would experience a thermite reaction with the highest temperature was defined. Experimental tests and computational simulations were performed, indicating that the spherical sleeves result in the lowest porosity in the risers and the pieces. It was also found that the risers with exothermic sleeves and 60% of the base volume used satisfy the feeding requirements and reduce the defects in the piece.

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“…The Ni/C catalyst was prepared via the submerged arc discharge method. The method was slightly modified from our previous report in ethanol medium . The arc discharge process employed a Ni-based carbon electrode as the anode (length = 50 mm and diameter = 10 mm) with a mass ratio of Ni powder/graphite/fructose of 1:3:1, which was calcinated at 180 °C for 6 h. The sharp-pointed electrode of the graphite rod was used as the cathode.…”

Section: Experimental Sectionmentioning

confidence: 99%

“…Haghighi et al synthesized Ni nanoparticles with a particle size of <50 nm via arc discharge in ethanol . Saraswati et al also successfully fabricated iron oxide/carbon via arc discharge in ethanol, resulting in carbon-coated iron nanoparticles that retain the iron’s magnetic properties . When using an iron catalyst, the carbon layers attached to it will facilitate subsequent carbon nanomaterial formation. , The metal/carbon catalyst produced by submerged arc discharge makes these composites act as catalysts and other carbon sources and provides magnetic properties for CNF growth.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Carbon Nanofibers Prepared with Ni and Ni/Graphitic Carbon Nanoparticle Catalysts for Glycine Detection Using Surface-Enhanced Raman Spectroscopy

Prasiwi

Saraswati

Anwar

et al. 2021

ACS Appl. Nano Mater.

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The combination of a noble metal with a carbon nanomaterial for surface-enhanced Raman scattering (SERS) has been commonly explored using metal-outside surface decoration to achieve a dominant electromagnetic enhancement mechanism. The use of a non-noble metal encapsulated inside carbon nanofibers (CNFs) for SERS is an interesting field of research because its heterogeneous structure possibly amplifies charge transfer, which induces the chemical enhancement mechanismbased SERS phenomena. This study investigated the use of magnetic CNFs in SERS for detecting small amino acid glycine as an analyte model. The magnetic CNFs were successfully synthesized via chemical vapor deposition (CVD) using Ni and carbon-wrapped Ni nanoparticles (Ni/C) as catalysts. The Ni/C catalyst was prepared via submerged arc discharge in a medium of ethanol/H 2 O. The CVD process was performed at different temperatures with Ar/C 2 H 2 gases, beginning with a synthesis temperature of 600 °C. The morphological analysis of the CVD product showed that the products had a typical structure of CNF-encapsulated Ni nanoparticles. However, Ni and Ni/C catalysts grew CNFs in different features. Ni/C-CNFs had a homogeneous diameter size and more crystalline graphitic carbon layers than Ni-CNFs. All produced CNFs possessed magnetic properties that correlated well with the Ni amount and its crystallization. The Raman intensity of glycine with the SERS substrate of dispersed CNFs grown using both catalysts was significantly higher than the normal Raman signal. The enhancement factor (EF) using the Ni/C-CNF substrate was higher (∼6 × 10 3 ) than that of the Ni-CNF substrate. The increase in the CVD temperature during CNF preparation led to increased Raman intensity and EF value. The crystalline graphitic structure in CNFs consisting of π-bonds and intra-and inter-layer overlapping p-orbital possessed accumulated electron transfer, which remarkably yielded SERS enhancement. The present work opens potential future research avenues to use these magnetic CNFs as SERS substrate with a considerable EF in biosensor applications.

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The Modification of Carbon with Iron Oxide Synthesized in Electrolysis Using the Arc Discharge Method

Cited by 3 publications

References 16 publications

Synthesis of Magnetic Composite of Iron Compounds/Carbon Nanotubes in Chemical Vapor Deposition

Synthesis of Magnetic Composite of Iron Compounds/Carbon Nanotubes in Chemical Vapor Deposition

Study on the Effects of Size-Shape Parameter Variation of Exothermic Riser Sleeves and Its Influence on Temperature Dependent Parameters

Magnetic Carbon Nanofibers Prepared with Ni and Ni/Graphitic Carbon Nanoparticle Catalysts for Glycine Detection Using Surface-Enhanced Raman Spectroscopy

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