Determination of Hg2+ in water based on acriflavine functionalized AgNPs by SERS
| Autor: | Jiawei Wu, Yanru Ding, Xiangfeng Bu, Baoqin Hao, Bing Zhao, Yuan Tian, Lixia Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Detection limit
010401 analytical chemistry 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Water based 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound symbols.namesake chemistry symbols Acriflavine Density functional theory Amalgam (chemistry) 0210 nano-technology Sensing system Spectroscopy Raman scattering Nuclear chemistry |
| Zdroj: | Microchemical Journal. 155:104736 |
| ISSN: | 0026-265X |
| Popis: | We conducted a related study on the determination of Hg2+ in water by surface-enhanced Raman scattering (SERS). It is based on acriflavine as a signal probe with the assistance of aggregation agent MgSO4 for the SERS investigation. Moreover, the density functional theory (DFT) calculations of acriflavine were performed for interpreting the assignments of the vibrational normal modes. The interaction of acriflavine with AgNPs was inhibited because the citrate reduced Hg2+ to Hg and formed Ag amalgam on the AgNPs surface. The formation of Ag-Hg alloys reduced the SERS intensity of acriflavine. This sensing system displayed excellent sensitivity and a detection limit as low as 1.4 mol L − 1. The relationship between the SERS intensity and Hg2+ concentration was found in the range of 0.1–8.0 × 10−7 mol L − 1. This method for detecting Hg2+ is inexpensive, facile and sensitive. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect