Facile preparation of orange-emissive carbon dots for the highly selective detection of silver ions
| Autor: | Wenjuan Lv, Juanjuan Liu, Min Na, Xingguo Chen, Yangxia Han, Yunxia Ma, Yonglei Chen, Sudai Ma |
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| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Quenching Aqueous solution Chemistry Metal ions in aqueous solution 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Fluorescence Catalysis 0104 chemical sciences Ion Linear range Materials Chemistry 0210 nano-technology Selectivity Nuclear chemistry |
| Zdroj: | New Journal of Chemistry. 43:5070-5076 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | The importance of measuring the content of silver ions (Ag+) in aqueous solutions and biological samples has increased in recent years due to their very high toxicity to the environment and the human body. Orange-emissive carbon dots (CDs) were simply synthesized through the hydrothermal treatment of p-aminobenzoic acid and p-aminophenol. The obtained CDs display orange fluorescence and stability, including favorable photostability, salt tolerance and water solubility. Significantly, the fluorescence intensity of the CDs was quenched by the addition of Ag+via static quenching to form a nonfluorescent complex; thus a highly selective fluorescent method for the determination of Ag+ was developed. The present method showed a rapid response and excellent selectivity for Ag+ over other metal ions, and the relevant linear range and limit of detection were 5–100 μM and 1.4 μM, respectively. Furthermore, the practicability of this method was validated by the successful determination of Ag+ in water samples and a human serum sample. Compared with previous reports, this method showed rapid response and excellent selectivity, which present it as a valuable strategy in environmental protection and biological assays. |
| Databáze: | OpenAIRE |
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