|
authors |
Pinheiro, PC; Tavares, DS; Daniel-da-Silva, AL; Lopes, CB; Pereira, E; Araujo, JP; Sousa, CT; Trindade, T |
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nationality |
International |
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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. |
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publisher |
AMER CHEMICAL SOC |
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issn |
1944-8244 |
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year published |
2014 |
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volume |
6 |
|
issue |
11 |
|
beginning page |
8274 |
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ending page |
8280 |
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digital object identifier (doi) |
10.1021/am5010865 |
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web of science category |
Nanoscience & Nanotechnology; Materials Science, Multidisciplinary |
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subject category |
Science & Technology - Other Topics; Materials Science |
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unique article identifier |
WOS:000337336900038
|
|
link |
24797729
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