Bibliographic Details
| Summary: | 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. |
|---|
| Main Authors: | pinheiro, pc |
|---|
| Other Authors: | tavares, ds; daniel-da-silva, ald; lopes, cb; pereira, e; araujo, jp; sousa, ct; trindade, t |
|---|
| Year: | 2014 |
|---|
| Country: | Portugal |
|---|
| Document type: | article |
|---|
| Access type: | open access |
|---|
| Associated institution: | Universidade do Porto |
|---|
| Language: | English |
|---|
| Origin: | Repositório Aberto da Universidade do Porto |
|---|