Carbon dots-modified silver nanoparticles as a new colorimetric sensor for selective determination of cupric ions

被引:39
作者
Beiraghi, Asadollah [1 ]
Najibi-Gehraz, Seyed Ali [1 ]
机构
[1] Kharazmi Univ, Fac Chem, Mofatteh Ave 49, Tehran, Iran
关键词
Carbon dots; Ag NPs; CDs-Ag NPs; Colorimetric sensor; Copper; GRAPHENE QUANTUM DOTS; FLUORESCENT-PROBE; AQUEOUS-SOLUTION; COPPER IONS; L-CYSTEINE; FACILE SYNTHESIS; GREEN SYNTHESIS; AG+ IONS; CU2+; GOLD;
D O I
10.1016/j.snb.2017.06.049
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In this work, carbon dots-modified silver nanoparticles (CDs-Ag NPs) were successfully prepared by reducing AgNO3 in the presence of carbon dots (CDs). The prepared CDs-Ag NPs were characterized by using UV-vis spectroscopy, IR spectroscopy, transmission electron microscopy (TEM), and dynamic light scattering (DLS). Aqueous dispersions of the CDs-Ag NPs showed strong surface plasmon resonance (SPR) absorption band at 430 nm. A simple, sensitive, and selective colorimetric Cu2+ sensor was developed on the basis of the strong interaction of functional groups of the CDs incorporated in CDs-Ag NPs with Cu+2 cations which in turn resulted in the aggregation of the nanoparticles and manifested itself in the change of color of CDs-Ag NPs dispersion from orange to red-brown. The main factors affecting the Cu2+ detection, including pH, concentration of CDs, ionic strength, and the interaction time, were optimized for finding out the best conditions for determination of Cu2+. Under the optimum conditions, the analytical response (A(525)/A(430)) was linear over the Cu2+ concentration in the range of 0.3-8 mu M (r(2) = 0.999) and a detection limit of 0.037 mu M was obtained. The method was successfully used for detection of Cu2+ in tap and river water samples. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:342 / 351
页数:10
相关论文
共 53 条
[11]   Colorimetric detection of iron ions (III) based on the highly sensitive plasmonic response of the N-acetyl-L-cysteine-stabilized silver nanoparticles [J].
Gao, Xiaohui ;
Lu, Yizhong ;
He, Shuijian ;
Li, Xiaokun ;
Chen, Wei .
ANALYTICA CHIMICA ACTA, 2015, 879 :118-125
[12]   Simultaneous preconcentration and determination of copper, nickel, cobalt and lead ions content by flame atomic absorption spectrometry [J].
Ghaedi, Mehrorang ;
Ahmadi, Farshid ;
Shokrollahi, Ardeshir .
JOURNAL OF HAZARDOUS MATERIALS, 2007, 142 (1-2) :272-278
[13]   Carbon dot cluster as an efficient "off-on" fluorescent probe to detect Au(III) and glutathione [J].
Gu, Jiangjiang ;
Hu, Donghua ;
Wang, Weina ;
Zhang, Qiuhong ;
Meng, Zhen ;
Jia, Xudong ;
Xi, Kai .
BIOSENSORS & BIOELECTRONICS, 2015, 68 :27-33
[14]   Hydrothermal synthesis of highly fluorescent carbon nanoparticles from sodium citrate and their use for the detection of mercury ions [J].
Guo, Yongming ;
Wang, Zhuo ;
Shao, Huawu ;
Jiang, Xingyu .
CARBON, 2013, 52 :583-589
[15]   A sensitive and selective colorimetric method for detection of copper ions based on anti-aggregation of unmodified gold nanoparticles [J].
Hormozi-Nezhad, M. Reza ;
Abbasi-Moayed, Samira .
TALANTA, 2014, 129 :227-232
[16]  
Jin WW, 2015, ANALYST, V140, P3507, DOI [10.1039/C5AN00230C, 10.1039/c5an00230c]
[17]   Graphene Quantum Dots as Fluorescence Probes for Sensing Metal Ions: Synthesis and Applications [J].
Ju, Jian ;
Chen, Wei .
CURRENT ORGANIC CHEMISTRY, 2015, 19 (12) :1150-1162
[18]   Synthesis of highly fluorescent nitrogen-doped graphene quantum dots for sensitive, label-free detection of Fe (III) in aqueous media [J].
Ju, Jian ;
Chen, Wei .
BIOSENSORS & BIOELECTRONICS, 2014, 58 :219-225
[19]  
Kailasa V.N.M., 2014, RSC ADV, V5, P10
[20]   Glutathione and L-cysteine modified silver nanoplates-based colorimetric assay for a simple, fast, sensitive and selective determination of nickel [J].
Kiatkumjorn, Thanyaporn ;
Rattanarat, Poomrat ;
Siangproh, Weena ;
Chailapakul, Orawon ;
Praphairaksit, Narong .
TALANTA, 2014, 128 :215-220