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Title: Testing the stability of magnetic iron oxides/kaolinite nanocomposite under various pH conditions

Abstract

Magnetically modified clays containing iron oxides nanoparticles (Fe{sub x}O{sub y} NPs) are low-cost and environmentally harmless materials suitable for sorption of pollutants from wastewaters. Stability of this smart material was evaluated both experimentally and theoretically using molecular modelling. Original kaolinite and prepared Fe{sub x}O{sub y}/kaolinite nanocomposite were characterized using X-ray fluorescence spectroscopy, X-ray powder diffraction, infrared spectroscopy, and transmission electron microscopy, and the stability was studied using leaching tests performed according to the European technical standard EN 12457-2 in deionized water and extraction agents with varying pH (2, 4, 9, and 11). The influence of pH on amount of Fe{sub x}O{sub y} NPs released from the composite and amount of the basic elements released from the kaolinite structure was studied using inductively coupled plasma atomic emission spectroscopy. All experiments proved that the magnetic properties of the nanocomposite will not change even after leaching in extraction agents with various pH. - Graphical abstract: The stability of magnetic Fe{sub x}O{sub y}/kaolinite nanocomposite was studied using molecular modelling and leaching tests under various pH conditions. Display Omitted - Highlights: • Magnetization by Fe{sub x}O{sub y} nanoparticles did not influenced the structure of the kaolinite. • Maghemite (γ-Fe{sub 2}O{sub 3}) and mainly magnetite (Fe{submore » 3}O{sub 4}) phases were detected. • Leaching test confirmed good adhesion of Fe{sub x}O{sub y} nanoparticles on kaolinite. • Molecular modelling of kaolinite/Fe{sub x}O{sub y} nanocomposite agrees well with experiments. • Nanocomposite can be considered stable in the wide range of pH.« less

Authors:
 [1];  [1];  [2]; ;  [1]
  1. Nanotechnology Centre, VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava (Czech Republic)
  2. (Czech Republic)
Publication Date:
OSTI Identifier:
22742039
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: 253; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ABSORPTION SPECTROSCOPY; CRYSTAL LATTICES; FERRITES; FLUORESCENCE SPECTROSCOPY; INFRARED SPECTRA; IRON OXIDES; KAOLINITE; LEACHING; MAGNETIC PROPERTIES; MAGNETIZATION; NANOCOMPOSITES; NANOPARTICLES; OXIDATION; SIMULATION; TESTING; TRANSMISSION ELECTRON MICROSCOPY; WASTE WATER; X-RAY DIFFRACTION; X-RAY FLUORESCENCE ANALYSIS

Citation Formats

Tokarčíková, Michaela, Tokarský, Jonáš, IT4Innovations, VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Kutláková, Kateřina Mamulová, and Seidlerová, Jana. Testing the stability of magnetic iron oxides/kaolinite nanocomposite under various pH conditions. United States: N. p., 2017. Web. doi:10.1016/J.JSSC.2017.06.004.
Tokarčíková, Michaela, Tokarský, Jonáš, IT4Innovations, VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Kutláková, Kateřina Mamulová, & Seidlerová, Jana. Testing the stability of magnetic iron oxides/kaolinite nanocomposite under various pH conditions. United States. doi:10.1016/J.JSSC.2017.06.004.
Tokarčíková, Michaela, Tokarský, Jonáš, IT4Innovations, VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava, Kutláková, Kateřina Mamulová, and Seidlerová, Jana. Fri . "Testing the stability of magnetic iron oxides/kaolinite nanocomposite under various pH conditions". United States. doi:10.1016/J.JSSC.2017.06.004.
@article{osti_22742039,
title = {Testing the stability of magnetic iron oxides/kaolinite nanocomposite under various pH conditions},
author = {Tokarčíková, Michaela and Tokarský, Jonáš and IT4Innovations, VŠB – Technical University of Ostrava, 17. listopadu 15, 708 33 Ostrava and Kutláková, Kateřina Mamulová and Seidlerová, Jana},
abstractNote = {Magnetically modified clays containing iron oxides nanoparticles (Fe{sub x}O{sub y} NPs) are low-cost and environmentally harmless materials suitable for sorption of pollutants from wastewaters. Stability of this smart material was evaluated both experimentally and theoretically using molecular modelling. Original kaolinite and prepared Fe{sub x}O{sub y}/kaolinite nanocomposite were characterized using X-ray fluorescence spectroscopy, X-ray powder diffraction, infrared spectroscopy, and transmission electron microscopy, and the stability was studied using leaching tests performed according to the European technical standard EN 12457-2 in deionized water and extraction agents with varying pH (2, 4, 9, and 11). The influence of pH on amount of Fe{sub x}O{sub y} NPs released from the composite and amount of the basic elements released from the kaolinite structure was studied using inductively coupled plasma atomic emission spectroscopy. All experiments proved that the magnetic properties of the nanocomposite will not change even after leaching in extraction agents with various pH. - Graphical abstract: The stability of magnetic Fe{sub x}O{sub y}/kaolinite nanocomposite was studied using molecular modelling and leaching tests under various pH conditions. Display Omitted - Highlights: • Magnetization by Fe{sub x}O{sub y} nanoparticles did not influenced the structure of the kaolinite. • Maghemite (γ-Fe{sub 2}O{sub 3}) and mainly magnetite (Fe{sub 3}O{sub 4}) phases were detected. • Leaching test confirmed good adhesion of Fe{sub x}O{sub y} nanoparticles on kaolinite. • Molecular modelling of kaolinite/Fe{sub x}O{sub y} nanocomposite agrees well with experiments. • Nanocomposite can be considered stable in the wide range of pH.},
doi = {10.1016/J.JSSC.2017.06.004},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = 253,
place = {United States},
year = {2017},
month = {9}
}