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Green synthesized silver nanoparticles for selective colorimetric sensing of Hg2+ in aqueous solution at wide pH range.
- Source :
-
Analyst . 2013, Vol. 138 Issue 15, p4370-4377. 8p. - Publication Year :
- 2013
-
Abstract
- In the present study, the syntheses of crystalline silver and gold nanoparticles (NPs) has been demonstrated in a green and environmentally friendly approach using citrus fruit extracts (lemon, Citrus limon (Cl-1) and sweet orange, Citrus limetta (Cl-2)). In addition, potentially hazardous metal ion sensing properties of these NPs in aqueous solution has been explored. Cl-1 and Cl-2 that predominantly contained citric and ascorbic acid, exhibited different reducing abilities towards silver and gold ions into NPs. Cl-1 reduces silver ions into AgNPs only in the presence of sunlight whereas AuNPs from gold ions were formed without exposure to sunlight. In contrast, Cl-2 converts both silver and gold ions into the corresponding NPs in the absence of sunlight. The colorimetric sensor studies of these green synthesized AgNPs (Cl-1–AgNPs) showed selective sensing of the potentially hazardous Hg2+ ion in water at micromolar concentrations. More importantly, green synthesized Cl-1–AgNPs sensor systems detected Hg2+ ions in water in a wide pH range (3.2 to 8.5). [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00032654
- Volume :
- 138
- Issue :
- 15
- Database :
- Academic Search Index
- Journal :
- Analyst
- Publication Type :
- Academic Journal
- Accession number :
- 100866390
- Full Text :
- https://doi.org/10.1039/c3an00320e