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
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.
Key words：Quercetin；Natural；Ag@SiO2 core-shell nanoparticles；Fluorescence sensor；Copper ion
基金资助: Sate Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Guangxi Normal University), National Natural Science Foundation of China (21372117), Fok Ying Tung Education Foundation (141030), Research Fund for the Doctoral Program of Higher Education of China (20133204120009), and the priority academic program development of Jiangsu higher education institutions
通讯作者:
徐 莉，徐海军
E-mail: xuliqby@njfu.edu.cn
作者简介: JIANG Wei-na, (1986—), female, doctor in College of Chemical Engineering, Nanjing Forestry University
e-mail: 121702969@qq.com
引用本文:
姜维娜，杨世龙，卢 雯，徐 莉，唐 颖，薛华玉，高步红，杜丽婷，孙海军，马猛涛，徐海军，曹福亮. 槲皮素包裹修饰硅包银纳米颗粒作为荧光传感器对铜离子的识别作用[J]. 光谱学与光谱分析, 2018, 38(08): 2650-2656.
JIANG Wei-na, YANG Shi-long, LU Wen, XU Li, TANG Ying, XUE Hua-yu, GAO Bu-hong, DU Li-ting, SUN Hai-jun, MA Meng-tao, XU Hai-jun, CAO Fu-liang. Quercetin-Functionalized Core-Shell Ag@SiO2 Nanoparticles for Detection of Copper Ions. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2018, 38(08): 2650-2656.
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