Facile synthesis of N-acetyl-L-cysteine capped ZnS quantum dots as an eco-friendly fluorescence sensor for Hg2+

被引：88

作者：

Duan, Junling ^{[1
]}

Jiang, Xiaochen ^{[1
]}

Ni, Shouqing ^{[1
]}

Yang, Min ^{[1
]}

Zhan, Jinhua ^{[1
]}

机构：

[1] Shandong Univ, Key Lab Colloid & Interface Chem, Minist Educ, Dept Chem, Jinan 250100, Peoples R China

来源：

TALANTA | 2011年 / 85卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Zinc sulfide; Quantum dots; Sensors; Fluorescence; Mercury ions; Nanoparticles; AQUEOUS-SOLUTION; GOLD NANOPARTICLES; MERCURY(II) ION; TURN-ON; SENSING MERCURY(II); SELECTIVE DETECTION; CDS NANOPARTICLES; OPTICAL-DETECTION; ENERGY-TRANSFER; MERCURIC ION;

D O I：

10.1016/j.talanta.2011.06.071

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper described an investigation of a novel eco-friendly fluorescence sensor for Hg2+ ions based on N-acetyl-L-cysteine (NAC)-capped ZnS quantum dots (QDs) in aqueous solution. By using safe and low-cost materials, ZnS QDs modified by NAC were easily synthesized in aqueous medium via a one-step method. The quantitative detection of Hg2+ ions was developed based on fluorescence quenching of ZnS QDs with high sensitivity and selectivity. Under optimal conditions, its response was linearly proportional to the concentration of Hg2+ ions in a range from 0 to 2.4 x 10(-6) mol L-1 with a detection limit of 5.0 x 10(-6) mol L-1. Most of common physiologically relevant cations and anions did not interfere with the detection of Hg2+. The proposed method was applied to the trace determination of Hg2+ ions in water samples. The possible quenching mechanism was also examined by fluorescence and UV-vis absorption spectra. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：1738 / 1743

页数：6

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