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Materials 2019, 12(5), 829; https://doi.org/10.3390/ma12050829

Synthesis and Characterization of Flower-like Carbon-encapsulated Fe-C Nanoparticles for Application as Adsorbing Material

1
School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China
2
Research Institute for Energy Equipment Materials, Hebei University of Technology, Tianjin 300130, China
*
Authors to whom correspondence should be addressed.
Received: 20 January 2019 / Revised: 26 February 2019 / Accepted: 7 March 2019 / Published: 12 March 2019
(This article belongs to the Special Issue Magnetic Properties of Carbon Nanomaterials)
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Abstract

Carbon-encapsulated Fe-C ([email protected]) nanoparticles with a divergently flower-like morphology were successfully synthesized for application as an adsorbing material by using freeze-drying and chemical vapor deposition (CVD) methods. The Fe metallic source was first loaded onto a sodium chloride (NaCl) supporter via freeze-drying to obtain the Fe/NaCl composite powder. Then, [email protected] nanoparticles were synthesized in the temperature range of 300–450 °C via CVD of acetylene in the Fe/NaCl composite powder using Fe nanoparticles as catalysts and NaCl as supporters. Because the NaCl supporter is water-soluble, the synthesized [email protected] nanoparticles were easy to purify, and a high purity was obtained by simple washing and centrifugation. The optimal [email protected] nanoparticles, synthesized at 400 °C, possessed a unique divergently flower-like structure and a high specific surface area of 169.4 m2/g that can provide more adsorption sites for contaminants. Adsorption experiments showed that the flower-like [email protected] adsorbent exhibited high adsorption capacity (90.14 mg/g) and fast removal of methylene blue (MB). Moreover, the magnetic properties of the nanoparticles, with saturation magnetization of 36.544 emu/g, facilitated their magnetic separation from wastewater. Therefore, the novel flower-like [email protected] nanoparticles with integrated adsorptive and magnetic properties have the potential to be an effective adsorbent in dye wastewater treatment. View Full-Text
Keywords: carbon-encapsulated magnetic nanoparticles; chemical vapor deposition; magnetic property; adsorptive property carbon-encapsulated magnetic nanoparticles; chemical vapor deposition; magnetic property; adsorptive property
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhao, L.; Dai, X.; Li, B.; Wang, H.; Li, H.; Liang, C. Synthesis and Characterization of Flower-like Carbon-encapsulated Fe-C Nanoparticles for Application as Adsorbing Material. Materials 2019, 12, 829.

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