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Magnetic Carbon Composite Particles for Dye Adsorption from Water and their Electrochemical Regeneration
Author(s) -
Schneider Michael,
Ballweg Thomas,
Groß Lennart,
Gellermann Carsten,
SanchezSanchez Angela,
Fierro Vanessa,
Celzard Alain,
Mandel Karl
Publication year - 2019
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201800537
Subject(s) - superparamagnetism , chemical engineering , adsorption , composite number , furfuryl alcohol , materials science , magnetite , pyrolysis , carbon fibers , particle (ecology) , magnetic nanoparticles , composite material , nanoparticle , nanotechnology , chemistry , organic chemistry , magnetization , metallurgy , catalysis , physics , oceanography , quantum mechanics , magnetic field , engineering , geology
Herein, the development of a novel composite particle system prepared from superparamagnetic Fe 3 O 4 @SiO 2 microparticles as core and coated with a carbon shell is presented. The coating with carbon is done by pyrolyzing furan resin, which was previously deposited on the particle surface by poly‐merization of furfuryl alcohol. The novel composite material thus combines magnetic and sorptive properties. Upon pyrolysis the magnetic material is converted from magnetite to α‐iron and fayalite, changing its behavior from superparamagnetic to ferromagnetic with nearly zero remanence. The magnetic properties can be utilized to magnetically collect the particles dispersed in fluids, whereas the sorptive properties of the carbon shell can be used to remove organic contaminants from these fluids. The adsorption behavior of the composite particles and a potential electrochemical regeneration route are investigated, using the model dye methylene blue.