Agglomeration of 10 nm amine-functionalized nano-magnetite does not hinder its efficiency as an environmental adsorbent

Hyun Kyung Kim, Jae-Woo Park

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Amine-functionalized magnetite (nFe3O4-NH2) of two different sizes, 10 nm and 250 nm, were compared as environmental adsorbents. They were synthesized by co-precipitation (10 nm-nFe3O4-NH2) and solvothermal (250 nm-nFe3O4-NH2) methods, respectively. The prepared amine-functionalized magnetite was characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared spectroscopy, size distribution analysis and surface area analysis to compare the properties of different sizes of nFe3O4-NH2. Both nFe3O4-NH2 contained cubic Fe3O4 crystalline structure. The 250 nm-nFe3O4-NH2 exhibited higher magnetic saturation value than the 10 nm-nFe3O4-NH2, but both could be separated from an aqueous solution using an external magnet. The surface area and pore volume of the smaller-sized 10 nm-nFe3O4-NH2 was larger than that of 250 nm-nFe3O4-NH2, but stronger aggregation was observed in the 10 nm-nFe3O4-NH2. Batch adsorption of lead indicated that the 10 nm-nFe3O4-NH2 was a better adsorbent than the 250 nm-nFe3O4-NH2. The maximum adsorption capacity of lead for the 10 nm-nFe3O4-NH2 and the 250 nm-nFe3O4-NH2 were 74.48 mg g–1 and 54.54 mg g–1, respectively. The stronger aggregation of nanoparticles with a smaller particle size did not affect the superior performance of the 10 nm-nFe3O4-NH2 as an environmental adsorbent.

Original languageEnglish
Pages (from-to)648-656
Number of pages9
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume54
Issue number7
DOIs
StatePublished - 2019 Jun 7

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Magnetite
Adsorbents
Amines
Agglomeration
Electron microscopes
Lead
Adsorption
Magnetometers
Saturation magnetization
Coprecipitation
Fourier transform infrared spectroscopy
Magnets
Particle size
Nanoparticles
Crystalline materials
Scanning
X ray diffraction

Keywords

  • Magnetite
  • adsorption
  • aggregation
  • amine
  • nano

Cite this

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title = "Agglomeration of 10 nm amine-functionalized nano-magnetite does not hinder its efficiency as an environmental adsorbent",
abstract = "Amine-functionalized magnetite (nFe3O4-NH2) of two different sizes, 10 nm and 250 nm, were compared as environmental adsorbents. They were synthesized by co-precipitation (10 nm-nFe3O4-NH2) and solvothermal (250 nm-nFe3O4-NH2) methods, respectively. The prepared amine-functionalized magnetite was characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared spectroscopy, size distribution analysis and surface area analysis to compare the properties of different sizes of nFe3O4-NH2. Both nFe3O4-NH2 contained cubic Fe3O4 crystalline structure. The 250 nm-nFe3O4-NH2 exhibited higher magnetic saturation value than the 10 nm-nFe3O4-NH2, but both could be separated from an aqueous solution using an external magnet. The surface area and pore volume of the smaller-sized 10 nm-nFe3O4-NH2 was larger than that of 250 nm-nFe3O4-NH2, but stronger aggregation was observed in the 10 nm-nFe3O4-NH2. Batch adsorption of lead indicated that the 10 nm-nFe3O4-NH2 was a better adsorbent than the 250 nm-nFe3O4-NH2. The maximum adsorption capacity of lead for the 10 nm-nFe3O4-NH2 and the 250 nm-nFe3O4-NH2 were 74.48 mg g–1 and 54.54 mg g–1, respectively. The stronger aggregation of nanoparticles with a smaller particle size did not affect the superior performance of the 10 nm-nFe3O4-NH2 as an environmental adsorbent.",
keywords = "Magnetite, adsorption, aggregation, amine, nano",
author = "Kim, {Hyun Kyung} and Jae-Woo Park",
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T1 - Agglomeration of 10 nm amine-functionalized nano-magnetite does not hinder its efficiency as an environmental adsorbent

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N2 - Amine-functionalized magnetite (nFe3O4-NH2) of two different sizes, 10 nm and 250 nm, were compared as environmental adsorbents. They were synthesized by co-precipitation (10 nm-nFe3O4-NH2) and solvothermal (250 nm-nFe3O4-NH2) methods, respectively. The prepared amine-functionalized magnetite was characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared spectroscopy, size distribution analysis and surface area analysis to compare the properties of different sizes of nFe3O4-NH2. Both nFe3O4-NH2 contained cubic Fe3O4 crystalline structure. The 250 nm-nFe3O4-NH2 exhibited higher magnetic saturation value than the 10 nm-nFe3O4-NH2, but both could be separated from an aqueous solution using an external magnet. The surface area and pore volume of the smaller-sized 10 nm-nFe3O4-NH2 was larger than that of 250 nm-nFe3O4-NH2, but stronger aggregation was observed in the 10 nm-nFe3O4-NH2. Batch adsorption of lead indicated that the 10 nm-nFe3O4-NH2 was a better adsorbent than the 250 nm-nFe3O4-NH2. The maximum adsorption capacity of lead for the 10 nm-nFe3O4-NH2 and the 250 nm-nFe3O4-NH2 were 74.48 mg g–1 and 54.54 mg g–1, respectively. The stronger aggregation of nanoparticles with a smaller particle size did not affect the superior performance of the 10 nm-nFe3O4-NH2 as an environmental adsorbent.

AB - Amine-functionalized magnetite (nFe3O4-NH2) of two different sizes, 10 nm and 250 nm, were compared as environmental adsorbents. They were synthesized by co-precipitation (10 nm-nFe3O4-NH2) and solvothermal (250 nm-nFe3O4-NH2) methods, respectively. The prepared amine-functionalized magnetite was characterized by scanning electron microscope, transmission electron microscope, X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared spectroscopy, size distribution analysis and surface area analysis to compare the properties of different sizes of nFe3O4-NH2. Both nFe3O4-NH2 contained cubic Fe3O4 crystalline structure. The 250 nm-nFe3O4-NH2 exhibited higher magnetic saturation value than the 10 nm-nFe3O4-NH2, but both could be separated from an aqueous solution using an external magnet. The surface area and pore volume of the smaller-sized 10 nm-nFe3O4-NH2 was larger than that of 250 nm-nFe3O4-NH2, but stronger aggregation was observed in the 10 nm-nFe3O4-NH2. Batch adsorption of lead indicated that the 10 nm-nFe3O4-NH2 was a better adsorbent than the 250 nm-nFe3O4-NH2. The maximum adsorption capacity of lead for the 10 nm-nFe3O4-NH2 and the 250 nm-nFe3O4-NH2 were 74.48 mg g–1 and 54.54 mg g–1, respectively. The stronger aggregation of nanoparticles with a smaller particle size did not affect the superior performance of the 10 nm-nFe3O4-NH2 as an environmental adsorbent.

KW - Magnetite

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JF - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering

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