Colorimetric detection of Cd(II) ions based on di-(1H-pyrrol-2-yl)methanethione functionalized gold nanoparticles

被引：50
|
作者：
Sung, Yi-Ming [1 ]
Wu, Shu-Pao [1 ]
机构：
[1] Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu, Taiwan
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2014年 / 201卷
关键词：
Colorimetric sensor; Cd(II); Gold nanoparticles; Di-(1H-pyrrol-2-yl)methanethione; PLASMONIC PROPERTIES; FLUORESCENT SENSOR; CADMIUM; ACID; ANTIAGGREGATION; SELECTIVITY; CHEMISTRY; LEAD; SIZE; CD2+;
D O I：
10.1016/j.snb.2014.04.069
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A sensitive and selective colorimetric Cd2+ detection method was developed using di-(1H-pyrrol-2-yl)methanethione functionalized gold nanoparticles (DP-AuNPs). Aggregation of DP-AuNPs was induced immediately in the presence of Cd2+, yielding a color change from red to blue. This Cd2+-induced aggregation of DP-AuNPs was monitored using the naked eye and UV-vis spectroscopy. The SPR absorbance( 635 nm) of the reaction between DP-AuNPs and Cd2+ shows a good linearity in the Cd2+ concentration range of 0.5-16 mu M and a low detection limit 16.6 nM (S/N = 3). The DP-AuNPs showed excellent selectivity toward Cd2+ compared to other metal ions Ag+, Al3+, Ca2+, Cd2+, Co2+, Cr3+, Cu2+, Fe2+, Fe3+, Hg2+, Mg2+, Mn2+, Ni2+, Pb2+, and Zn2+. Optimal detection of Cd2+ was achieved over a pH range from 4 to 9.5. Furthermore, DP-AuNPs were applied to detect Cd2+ in lake water, showing low interference. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：86 / 91
页数：6
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