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Title: Cobalt ferrite nanoparticle intercalated carbon nanotubes for a nanomagnetic ultrasensitive sensor of Cr-VI in water

Abstract

Nanocomposites of cobalt ferrite (CFO) magnetic nanoparticles intercalated on carbon nanotubes (CNTs) are evaluated as a nanomagnetic ultrasensitive sensor for the environmental toxin, hexavalent chromium (Cr-VI). Specifically, the structural and magnetic changes that accompany the infiltration of the CFO/CNTs by Cr-VI are presented. Extended x-ray absorption fine structure (EXAFS) shows that the atomic spacing within the CFO structure changes in the presence of Cr, suggesting that the Cr is incorporated into the nanoparticles. Vibrating sample magnetometry (VSM) reveals that CFO/CNTs composite infiltrated with Cr-VI have a 71% enhancement in saturation magnetization compared with the uninfiltrated CFO/CNTs, while small-angle neutron scattering (SANS) suggests that this magnetic enhancement is not associated with the nanoparticle lengthscales, but may arise from longer-ranged clusters. Both VSM and SANS clearly demonstrate that the Cr-doped CFO/CNTs are hysteretic with a net magnetization at remanence that is about 1/3 that of saturation, while this hysteresis is absent in the undoped CFO/CNTs. These magnetic differences at either remanence or saturation are promising for the magnetic detection of Cr-VI using CFO/CNTs sensors.

Authors:
ORCiD logo [1];  [2];  [3];  [4]; ORCiD logo [5];  [6];  [7]; ORCiD logo [1]
+ Show Author Affiliations
  1. Morgan State Univ., Baltimore, MD (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  4. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  5. Nicholls State Univ., Thibodaux, LA (United States)
  6. South Dakota School of Mines and Technology, Rapid City, SD (United States)
  7. Army Research Lab., Adelphi, MD (United States)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1635477
Report Number(s):
BNL-216096-2020-JAAM
Journal ID: ISSN 2158-3226; TRN: US2202007
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 10; Journal Issue: 6; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Mekuria, Tassew, Khalid, Syed, Krycka, Kathryn, Bleuel, Markus, Verma, Himanshu, Hong, Haiping, Karna, Shashi P., and Seifu, Dereje. Cobalt ferrite nanoparticle intercalated carbon nanotubes for a nanomagnetic ultrasensitive sensor of Cr-VI in water. United States: N. p., 2020. Web. doi:10.1063/5.0011911.
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Mekuria, Tassew, Khalid, Syed, Krycka, Kathryn, Bleuel, Markus, Verma, Himanshu, Hong, Haiping, Karna, Shashi P., & Seifu, Dereje. Cobalt ferrite nanoparticle intercalated carbon nanotubes for a nanomagnetic ultrasensitive sensor of Cr-VI in water. United States. https://doi.org/10.1063/5.0011911
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Mekuria, Tassew, Khalid, Syed, Krycka, Kathryn, Bleuel, Markus, Verma, Himanshu, Hong, Haiping, Karna, Shashi P., and Seifu, Dereje. Wed . "Cobalt ferrite nanoparticle intercalated carbon nanotubes for a nanomagnetic ultrasensitive sensor of Cr-VI in water". United States. https://doi.org/10.1063/5.0011911. https://www.osti.gov/servlets/purl/1635477.
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@article{osti_1635477,
title = {Cobalt ferrite nanoparticle intercalated carbon nanotubes for a nanomagnetic ultrasensitive sensor of Cr-VI in water},
author = {Mekuria, Tassew and Khalid, Syed and Krycka, Kathryn and Bleuel, Markus and Verma, Himanshu and Hong, Haiping and Karna, Shashi P. and Seifu, Dereje},
abstractNote = {Nanocomposites of cobalt ferrite (CFO) magnetic nanoparticles intercalated on carbon nanotubes (CNTs) are evaluated as a nanomagnetic ultrasensitive sensor for the environmental toxin, hexavalent chromium (Cr-VI). Specifically, the structural and magnetic changes that accompany the infiltration of the CFO/CNTs by Cr-VI are presented. Extended x-ray absorption fine structure (EXAFS) shows that the atomic spacing within the CFO structure changes in the presence of Cr, suggesting that the Cr is incorporated into the nanoparticles. Vibrating sample magnetometry (VSM) reveals that CFO/CNTs composite infiltrated with Cr-VI have a 71% enhancement in saturation magnetization compared with the uninfiltrated CFO/CNTs, while small-angle neutron scattering (SANS) suggests that this magnetic enhancement is not associated with the nanoparticle lengthscales, but may arise from longer-ranged clusters. Both VSM and SANS clearly demonstrate that the Cr-doped CFO/CNTs are hysteretic with a net magnetization at remanence that is about 1/3 that of saturation, while this hysteresis is absent in the undoped CFO/CNTs. These magnetic differences at either remanence or saturation are promising for the magnetic detection of Cr-VI using CFO/CNTs sensors.},
doi = {10.1063/5.0011911},
journal = {AIP Advances},
number = 6,
volume = 10,
place = {United States},
year = {2020},
month = {6}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1063/5.0011911
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Cited by: 5 works
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Figures / Tables:

Figure 1 Figure 1: (A) Polarization analyzed small-angle neutron scattering on the vSANS instrument involving the neutron spin polarization components of a supermirror, radiofrequency spin flipper, and a 3He spin analyzer. The neutron spins follow the applied magnetic field as shown unless they encounter abrupt magnetic changes such as within the sample.more » (B) EXAFS instrumental anatomy.« less
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Works referenced in this record:

Emerging environmental contaminants: Challenges facing our next generation and potential engineering solutions
journal, November 2017

Study of the effect of ultrasonic agitation on the defects size in electro-deposited chromium layer by small-angle neutron scattering
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Fabrication and characterization of cobalt ferrite (CoFe2O4) nanofibers by electrospinning
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Scattering functions of carved-ellipsoid-shaped particles
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Hexavalent Chromium Sources and Distribution in California Groundwater
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3 He spin filter based polarized neutron capability at the NIST Center for Neutron Research
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Proximity effect tuned magnetic properties in composites of carbon nanotubes and nanoparticles of CoFe2O4
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Phytoremediation strategies for soils contaminated with heavy metals: Modifications and future perspectives
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The effect of self-consistent potentials on EXAFS analysis
journal, October 2017

Chromium Isotopes and the Fate of Hexavalent Chromium in the Environment
journal, March 2002

Heavy Metals Contamination in Water and their Hazardous Effect on Human Health-A Review
journal, October 2016

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Magnetic Nanocarbon Adsorbents with Enhanced Hexavalent Chromium Removal: Morphology Dependence of Fibrillar vs Particulate Structures
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Multilayered graphene acquires ferromagnetism in proximity with magnetite particles
journal, May 2015

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  • Applied Physics Letters, Vol. 106, Issue 21
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