Magnetic Nanoparticles of Zinc/Calcium Ferrite Decorated with Silver for Photodegradation of Dyes
authors Fernandes, RJC; Magalhaes, CAB; Amorim, CO; Amaral, VS; Almeida, BG; Castanheira, EMS; Coutinho, PJG
nationality International
journal MATERIALS
author keywords magnetic nanoparticles; zinc/calcium ferrite; silver decorated nanoparticles; photodegradation; textile dyes
keywords PHOTOCATALYTIC DEGRADATION; RHODAMINE-B; AQUEOUS-SOLUTION; SOL-GEL; COPRECIPITATION; POWDER; NANOCRYSTALS; NEUTRON; SIZE
abstract Magnetic nanoparticles of zinc/calcium ferrite and decorated with silver were prepared by coprecipitation method. The obtained nanoparticles were characterized by UV/Visible absorption, XRD, TEM and SQUID. The mixed zinc/calcium ferrites exhibit an optical band gap of 1.78 eV. HR-TEM imaging showed rectangular nanoplate shapes with sizes of 10 +/- 3 nm and aspect ratio mainly between 1 and 1.5. Magnetic measurements indicated a superparamagnetic behavior. XRD diffractograms allowed a size estimation of 4 nm, which was associated with the nanoplate thickness. The silver-decorated zinc/calcium ferrite nanoparticles were successfully employed in the photodegradation of a model dye (Rhodamine B) and industrial textile dyes (CI Reactive Red 195, CI Reactive Blue 250 and CI Reactive Yellow 145). The nanosystems developed exhibited promising results for industrial application in effluent photoremediation using visible light, with the possibility of magnetic recovery.
publisher MDPI
isbn 1996-1944
year published 2019
volume 12
issue 21
digital object identifier (doi) 10.3390/ma12213582
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000502798800123
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journal analysis (jcr 2019):
journal impact factor 3.057
5 year journal impact factor 3.424
category normalized journal impact factor percentile 58.121
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