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| Quercetin-Functionalized Core-Shell Ag@SiO2 Nanoparticles for Detection of Copper Ions |
| JIANG Wei-na1,2, YANG Shi-long1,3, LU Wen4, XU Li2,3,4*, TANG Ying2,3,5, XUE Hua-yu1, GAO Bu-hong3, DU Li-ting3, SUN Hai-jun3, MA Meng-tao4, XU Hai-jun1*, CAO Fu-liang2,5 |
1. College of Chemical Engineering, Nanjing Forestry University，Nanjing 210037, China
2. Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing 210037, China
3. Advanced Analysis and Testing Center, Nanjing Forestry University, Nanjing 210037, China
4. College of Science, Nanjing Forestry University, Nanjing 210037, China
5. College of Forestry, Nanjing Forestry University, Nanjing 210037, China |
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Abstract A novel fluorescent sensor based on natural quercetin and core-shell Ag@SiO2 nanoparticles for highly sensitive and selective detection of copper ions has been studied. The Ag@SiO2@Quercetin fluorescent sensor after binding to Cu2+ ions showed a quenching of fluorescence emission intensity. The sensor can be applied to the quantification of Cu2+ ions with a linear range of 3.0×10-7～4.8×10-6 mol·L-1 and a detection limit of 1.0×10-7 mol·L-1. The sensor showed high selectivity toward Cu2+. As a result, the proposed fluorescent nanosensor was successfully applied for determination of Cu2+ in water samples with good recovery.
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Received: 2017-06-15
Accepted: 2017-10-29
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Corresponding Authors:
XU Li, XU Hai-jun
E-mail: xuliqby@njfu.edu.cn
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