Ultrasensitive mercury(II) ion detection by europium(III)-doped cadmium sulfide composite nanoparticles

被引：30

作者：

Chen, Hong-Qi ^{[1
]}

Fu, Jie ^{[1
]}

Wang, Lun ^{[1
]}

Ling, Bo ^{[1
]}

Qian, Bin-bin ^{[1
]}

Chen, Jing-guo ^{[1
]}

Zhou, Cai-ling ^{[1
]}

机构：

[1] Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Key Lab Chemo Biosensing, Wuhu 241000, Peoples R China

来源：

TALANTA | 2010年 / 83卷 / 01期

关键词：

Fluorescence; Cadmium sulfide nanoparticles; Eu3+; Mercury(II); Detection; SOLID-PHASE MICROEXTRACTION; THIOSALICYLIC-CAPPED CDS; QUANTUM DOTS; FLUORESCENCE; LUMINESCENT; NANOCRYSTALS; WATER; PHOTOLUMINESCENCE; RECOGNITION; EXTRACTION;

D O I：

10.1016/j.talanta.2010.08.052

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

With the biomolecule glutathione (GSH) as a capping ligand Eu3+-doped cadmium sulfide composite nanoparticles were successfully synthesized through a straightforward one-pot process An efficient fluorescence energy transfer system with CdS nanoparticles as energy donor and Eu3+ ions as energy accepter was developed As a result of specific interaction the fluorescence intensity of Eu3+-doped (dS nanoparticles is obviously reduced in the presence of Hg2+ Moreover the long fluorescent lifetime and large Stoke s shift of europium complex permit sensitive fluorescence detection Under the optimal conditions the fluorescence intensity of Eu3+ at 614 nm decreased linearly with the concentration of Hg2+ ranging from 10 nmol L-1 to 1500 nmol L-1 the limit of detection for Hg2+ was 0 25 nmol L-1 In addition to high stability and reproducibility the composite nanoparticles show a unique selectivity towards Hg2+ ion with respect to common coexisting cations Moreover the developed method was applied to the detection of trace Hg2+ in aqueous solutions The probable mechanism of reaction between Eu3+-doped CdS composite nanoparticles and Hg2+ was also discussed (C) 2010 Elsevier B V All rights reserved

引用

页码：139 / 144

页数：6

共 46 条

[1] Properties of glutathione- and phytochelatin-capped CdS bionanocrystallites [J].