Electrochemiluminescence sensor for hexavalent chromium based on the graphene quantum dots/peroxodisulfate system

被引：50
作者：
Chen, Yingmei
Dong, Yongqiang
Wu, Huan
Chen, Congqiang
Chi, Yuwu [1 ]
Chen, Guonan
机构：
[1] Fuzhou Univ, Fujian Prov Key Lab Anal & Detect Technol Food Sa, MOE Key Lab Anal & Detect Technol Food Safety, Fujian 350108, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2015年 / 151卷
基金：
中国国家自然科学基金;
关键词：
Electrochemiluminescence; graphene quantum dots; hexavalent chromium; detection; SPECIATION; CARBON; WATER; DOTS; SPECTROMETRY; EXTRACTION; EMISSION; SAMPLES;
D O I：
10.1016/j.electacta.2014.11.068
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A electrochemiluminescent (ECL) sensor has been designed to detect hexavalent chromium (Cr(VI)) in environmental water samples based on the fact that Cr(VI) can collisionally quench the ECL signal of graphene quantum dots/peroxodisulfate (GQD/S2O82-) system. After optimizing some important experimental conditions including the concentrations of GQDs and S2O82-, response time, and pH value of solution, the ECL sensor has been finally developed. The ECL sensor exhibits a wide linear response range (50 nM-60 mu M), excellent selectivity, and high sensitivity (detection limit of 20 nM, S/N = 3). Furthermore, the developed sensor has been applied in the detection of Cr(VI) in a spiked river water. The result suggests that the sensor can offer a simple, green, low cost, high selectivity and sensitivity detection of Cr(VI). (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：552 / 557
页数：6
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