| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1231129 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2012 | 6 Pages |
The noble metal nanoparticles (NPs), including gold nanorods (AuNRs), gold nanospheres (AuNSs) and silver nanoplates (AgNPTs), were synthesized and Tween 20 stabilized NPs (Tween 20-NPs) were used as the probes for determining Hg2+. Hg2+ was determined based on the strong affinity between Au (Ag) and Hg. Hg2+ was reduced to Hg in the presence of sodium borohydride. Hg interacts with the NPs and the diameter of the NPs decreases with the increase of Hg2+ concentration, which causes the shift in absorption peak of Tween 20-NPs. The peak shifts are linearly related to Hg2+ concentrations. Compared with AuNSs and AgNPTs, when the AuNRs was used, the sensitivity for determining Hg2+ was higher. The developed method shows a good selectivity for Hg2+ and can be applied to the determination of Hg2+ in water samples.
Graphical abstractThe noble metal nanoparticles (NPs), including gold nanorods (AuNRs), gold nanospheres (AuNSs) and silver nanoplates (AgNPTs), were synthesized. Hg2+ was determined using these NPs as probes. The sensitivity for determining Hg2+ obtained with AuNRs was the highest.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The sensitivity for determining mercury(II) ion using different shape nanoparticles as the probes was investigated. ► The proposed method is simple and sensitive. ► Compared with gold nanospheres and silver nanoplates, the gold nanorods have higher sensitivity for determining Hg2+.
