A versatile method for direct determination of iron content in multi-wall carbon nanotubes by inductively coupled plasma atomic emission spectrometry with slurry sample introduction

Bok-Badura, Joanna; Jakóbik‐Kolon, Agata; Turek, Marian; Boncel, Sławomir; Karoń, Krzysztof

doi:10.1039/c5ra22269a

Cited by 17 publications

(16 citation statements)

References 23 publications

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“…2d, h) and were heavily loaded up to ca. 11 wt.% with iron nanoparticles as measured by inductively coupled plasma atomic emission spectrometry (ICP-AES) [31].…”

Section: Resultsmentioning

confidence: 99%

Heat transfer nanofluid based on curly ultra-long multi-wall carbon nanotubes

et al. 2017

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The main challenge in the use of multi-wall carbon nanotube (MWCNT) as key components of nanofluids is to transfer excellent thermal properties from individual nanotubes into the bulk systems. We present studies on the performance of heat transfer nanofluids based on ultra-long (~2 mm), curly MWCNTs -in the background of various other nanoC-sp 2 , i.e. oxidized MWCNTs, commercially available Nanocyl™ MWCNTs and spherical carbon nanoparticles (SCNs). The nanofluids prepared via ultrasonication from water and propylene glycol were studied in terms of heat conductivity and heat transfer in a scaled up thermal circuit containing a copper helical heat exchanger. Ultra-long curly MWCNT (1 wt.%) nanofluids (stabilized with Gum Arabic in water) emerged as the most thermally conducting ones with a 23-30%-and 39%-enhancement as compared to the base-fluids for water and propylene glycol, respectively. For turbulent flows (Re = 8000-11,000), the increase of heat transfer coefficient for the overmonths stable 1 wt.% ultra-long MWCNT nanofluid was found as high as >100%. The findings allow to confirm that longer MWCNTs are promising solid components in nanofluids and hence to predict their broader application in heat transfer media.

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“…2d, h) and were heavily loaded up to ca. 11 wt.% with iron nanoparticles as measured by inductively coupled plasma atomic emission spectrometry (ICP-AES) [31].…”

Section: Resultsmentioning

confidence: 99%

Heat transfer nanofluid based on curly ultra-long multi-wall carbon nanotubes

et al. 2017

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“…Slurries were prepared using Triton X-100 (Sigma-Aldrich) as a dispersing agent according to the procedure described in literature [10,11]. Nitric acid (65%, Suprapur, Merck) was used in leaching studies.…”

Section: Materials and Reagentsmentioning

confidence: 99%

“…, and Nickel. Based on previously described experiment the range of slurries concentration to be tested was established as 40 to 400 mg L −1 [10]. To investigate the effect of slurry concentration on Ce, Zr, and Ni determination, three parallel samples of various slurries concentration were prepared by dilution of the primary slurries.…”

Section: Effect Of Slurry Concentration On Determination Of Cerium Zmentioning

confidence: 99%

“…Preparation. According to previously described protocol [10], the same dispersing agent, its concentration, and the conditions of ultrasonication were applied in this study. Effectiveness of homogenization method could be observed with the naked eye (Figures 2(a) and 2(b)).…”

Section: Icp-aes Samplementioning

confidence: 99%

“…In the present work we propose a fast and simple method of direct determination of metals contained in the CNTbased materials, based on ICP-AES analysis with slurry nebulization. This method has been previously successfully 2 used for determination of iron in multiwall carbon nanotubes (MWCNTs) [10]. The main advantage of this method is simple sample preparation protocol which does not require laborious and time-consuming digestion of examined material.…”

Section: Introductionmentioning

confidence: 99%

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A Method for Determination of Metals in Hybrid Metal Oxide/Metal-Carbon Nanotubes Catalysts

Bok-Badura

Jakóbik‐Kolon

Łamacz

et al. 2017

Journal of Chemistry

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Carbon nanotubes (CNTs), due to their special structure and unique properties, are still one of the most interesting materials for scientists. Recently, carbon nanotubes were proposed as a new type of carbon support for catalysts. Fe, Pt, Ni, Co, and other metals anchored to CNTs are used in various reactions. Due to the fact that production processes are usually unpredictable and the total amount of metal/metal oxide deposited on the CNTs may only be estimated, the methods for examining the chemical composition are necessary. In this study, fast and simple inductively coupled plasma atomic emission spectrometry (ICP-AES) with slurry nebulization was proposed for metal content determination in hybrid CeZrO2/CNT, Ni-CeZrO2/CNT, and Ni/CNT materials. Slurries were prepared by 30 min ultrasonication of appropriate amount of investigated material in 1% Triton X-100 solution. Optimal range of slurry concentration and optimal RF plasma power were established (40–400 mg L−1, 1.2 kW, resp.). Obtained results proved that this method may be applied for determination of Ce, Zr, and Ni in hybrid CNT-based materials.

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Dynamics of Iron Homeostasis in Health and Disease: Molecular Mechanisms and Methods for Iron Determination

Ploumi

Kyriakakis

Tavernarakis

2019

Series in BioEngineering

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A versatile method for direct determination of iron content in multi-wall carbon nanotubes by inductively coupled plasma atomic emission spectrometry with slurry sample introduction

Abstract: Determination of iron in MWCNTs takes about 15 min using the slurry ICP-AES method.

Cited by 17 publications

References 23 publications

Heat transfer nanofluid based on curly ultra-long multi-wall carbon nanotubes

Heat transfer nanofluid based on curly ultra-long multi-wall carbon nanotubes

A Method for Determination of Metals in Hybrid Metal Oxide/Metal-Carbon Nanotubes Catalysts

Dynamics of Iron Homeostasis in Health and Disease: Molecular Mechanisms and Methods for Iron Determination

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