Functionalized magnetite particles for adsorption of colloidal noble metal nanoparticles
authors Lopes, JL; Marques, KL; Girao, AV; Pereira, E; Trindade, T
nationality International
journal JOURNAL OF COLLOID AND INTERFACE SCIENCE
author keywords Magnetite; Nanoparticles; Nanometals; Magnetic separation
keywords WASTE-WATER TREATMENT; SUPERPARAMAGNETIC NANOPARTICLES; ENGINEERED NANOPARTICLES; GOLD NANOPARTICLES; REMOVAL; NANOMATERIALS; NANOTECHNOLOGY; ENVIRONMENT; CHEMISTRY; ACIDS
abstract Magnetite (inverse spinel type) particles have been surface-modified with siliceous shells enriched in dithiocarbamate groups. The deposition of colloidal noble metal nanoparticles (Au, Ag, Pt, Pd) onto the modified magnetites can be performed by treating the respective hydrosols with the magnetic sorbents, thus allowing their uptake from water under a magnetic gradient. In particular, for Au colloids, these magnetic particles are very efficient sorbents that we ascribe to the strong affinity of sulfur-containing groups at the magnetite surfaces for this metal. Considering the extensive use of Au colloids in laboratorial and industrial contexts, the approach described here might have an impact on the development of nanotechnologies to recover this precious metal. En route to these findings, we varied several operational parameters in order to investigate this strategy as a new bottom-up assembly method for producing plasmonic-magnetic nanoassemblies. (C) 2016 Elsevier Inc. All rights reserved.
publisher ACADEMIC PRESS INC ELSEVIER SCIENCE
issn 0021-9797
year published 2016
volume 475
beginning page 96
ending page 103
digital object identifier (doi) 10.1016/j.jcis.2016.04.046
web of science category Chemistry, Physical
subject category Chemistry
unique article identifier WOS:000376708400011
  ciceco authors
  impact metrics
times cited (wos core): 0
journal impact factor (jcr 2016): 4.233
5 year journal impact factor (jcr 2016): 3.988
category normalized journal impact factor percentile (jcr 2016): 76.207
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