Simple and sensitive detection method for Cobalt(II) in water using CePO4:Tb3+ nanocrystals as fluorescent probes

被引：27

作者：

Chen, Hongqi ^{[1
]}

Yuan, Fei ^{[1
]}

Xu, Juan ^{[1
]}

Zhang, Yiyang ^{[1
]}

Wu, Yong ^{[1
]}

Wang, Lun ^{[1
]}

机构：

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

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2013年 / 107卷

关键词：

Synchronous fluorescence spectrometry; CePO4:Tb3+ nanocrystals; Cobalt(II); Detection; Fluorescence energy transfer; ABSORPTION SPECTROMETRIC DETERMINATION; HUMAN SERUM-ALBUMIN; SPECTROPHOTOMETRIC DETERMINATION; ENERGY-TRANSFER; 1-(2-PYRIDYLAZO)-2-NAPHTHOL; PRECONCENTRATION; NANOPARTICLES; VOLTAMMETRY; SEPARATION; SYSTEM;

D O I：

10.1016/j.saa.2013.01.020

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A simple and sensitive method for detecting cobalt by synchronous fluorescence spectrometry technique with a novel fluorescence probe CePO4:Tb3+ has been developed. CePO4:Tb3+ nanocrystals were synthesized in aqueous solutions and characterized by transmission electron microscopy, electron diffraction pattern spectroscopy and spectrofluorometry. When Delta lambda = 210 nm, the selected synchronous fluorescence is produced at 284 nm. CePO4:Tb3+ nanocrystals were negatively charged under weakly basic conditions (pH = 8.2), which can interact with Co2+ via electrostatic interaction. Moreover, there is the spectrum overlap between the emission wavelength of CePO4:Tb3+ NCs and the absorbance of Co2+. So the energy transfer would occur, leading to the quenching phenomenon. The quenching equation of the system was agreed with the Stern-Volmer equation. The linear range and detection limit of Co2+ were 5-1.8 mu M and 3.5 nM, respectively. The method is successfully applied to the quantification of Co2+ in water samples. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：151 / 155

页数：5

共 25 条

[1] Selective spectrophotometric determination of cobalt(II) in synthetic mixtures and pharmaceutical formulates with 5-[o-carboxyphenylazo]2,4-dihydroxybenzoic acid [J].