A highly selective colorimetric sensor for ferrous ion based on polymethylacrylic acid-templated silver nanoclusters

被引:27
|
作者
Chaiendoo, Kanokwan [1 ,2 ]
Tuntulani, Thawatchai [3 ]
Ngeontae, Wittaya [1 ,2 ]
机构
[1] Khon Kaen Univ, Fac Sci, Dept Chem, Mat Chem Res Ctr, Khon Kaen 40002, Thailand
[2] Khon Kaen Univ, Fac Sci, Ctr Excellence Innovat Chem, Khon Kaen 40002, Thailand
[3] Chulalongkorn Univ, Fac Sci, Dept Chem, Bangkok 10330, Thailand
关键词
Silver nanoclusters; Colorimetric sensors; Chemical sensors; Ferrous ion; SPECTROPHOTOMETRIC DETERMINATION; SHIPBOARD DETERMINATION; FACILE PREPARATION; FOOD SAMPLES; IRON; FLUORESCENT; WATER; FE3+; ELECTRODE; CHEMOSENSOR;
D O I
10.1016/j.snb.2014.10.062
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A highly selective colorimetric sensor for detecting Fe2+ was proposed using the water-soluble silver nanoclusters (AgNCs) for the first time. AgNCs were synthesized via a one-pot reaction by using polymethacrylic acid (PMAA) as both a template and a reducing agent. The as-prepared AgNCs showed highly selective and sensitive detection toward Fe2+ over Fe3+ and other cations. Upon addition of Fe2+, the absorbance at 447 nm increased as a linear function of the increasing concentration of Fe2+. Parameters possibly affected the sensor sensitivity were investigated and optimized. The proposed sensor could efficiently be used for Fe2+ sensing at very low concentration with the limit of detection of 76 nM and the linear working concentration range of 5-100 mu M. The feasibility of the proposed sensor for determining Fe2+ in the iron supplement tablet samples was also studied and compared with 1,10-phenanthroline method as well as inductively couple plasma-optical emission spectroscopy (ICP-OES). The Fe2+ content obtained from three methods were not significantly different signifying the high accuracy of the proposed sensor. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:658 / 667
页数:10
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