Ferromagnetic Sorbents Based on Nickel Nanowires for Efficient Uptake of Mercury from Water
authors Pinheiro, PC; Tavares, DS; Daniel-da-Silva, AL; Lopes, CB; Pereira, E; Araujo, JP; Sousa, CT; Trindade, T
nationality International
journal ACS APPLIED MATERIALS & INTERFACES
author keywords nickel nanowires; ferromagnetic; mercury; dithiocarbamate; water quality monitoring
keywords MAGNETIC NANOWIRES; REMOVAL; PARTICLES; NANOPARTICLES; NANOMATERIALS; REMEDIATION; ALUMINA; ARRAYS
abstract This work reports the preparation of ferromagnetic nickel nanowires (NiNW) coated with dithiocarbamate-functionalized siliceous shells and its application for the uptake of aqueous Hg(II) ions by magnetic separation. NiNW with an average diameter and length of 35 nm and 5 mu m, respectively, were firstly prepared by Ni electrodeposition in an anodic aluminum oxide template. The NiNW surfaces were then coated with siliceous shells containing dithiocarbamate groups via a one-step procedure consisting in the alkaline hydrolytic co-condensation of tetraethoxysilane (TEOS) and a siloxydithio-carbamate precursor (SiDTC). A small amount of these new nanoadsorbents (2.5 mg.L-1) removed 99.8% of mercury ions from aqueous solutions with concentration 50 mu g.L-1 and in less than 24 h of contact time. This outstanding removal ability is attributed to the high affinity of the sulfur donor ligands to Hg(II) species combined with the high surface area-to-volume ratio of the NiNW.
publisher AMER CHEMICAL SOC
issn 1944-8244
year published 2014
volume 6
issue 11
beginning page 8274
ending page 8280
digital object identifier (doi) 10.1021/am5010865
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000337336900038
link 24797729

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