Citation: YAO Ai-Hua, LI Peng-Fei, ZHOU Tian, WANG De-Ping. Magnetic Fluorescence Composite Microspheres for Detection of Heavy Metal Ions[J]. Chinese Journal of Inorganic Chemistry, ;2014, (2): 303-309. doi: 10.11862/CJIC.2014.016 shu

Magnetic Fluorescence Composite Microspheres for Detection of Heavy Metal Ions

YAO Ai-Hua ^1,2,, ,
LI Peng-Fei ¹ ,
ZHOU Tian ¹ ,
WANG De-Ping ^1,2

1.
1 School of Materials Science and Engineering, Tongji University, Shanghai 200092, China;

Corresponding author: YAO Ai-Hua,
Received Date: 9 June 2013
Available Online: 6 August 2013
Fund Project:

Magnetic fluorescence composite microspheres were fabricated through a layer-by-layer electrostatic self-assembly method. Polyelectrolyte layers were firstly assembled onto the CaCO₃ hollow microspheres by the sequential deposition of the PSSand PAHpolyelectrolyte. And then Fe₃O₄ nanoparticles and CdSe quantum dots were simultaneously assembled onto the hollow microspheres. Furthermore, the resulting magnetic fluorescence composite microspheres were utilized as a chemosensor for the detection of Cu²⁺ and Pb²⁺ in aqueous solutions. The results showed that the composite microspheres exhibited strong fluorescence and magnetism, high sensitivity and selectivity towards Cu²⁺ and Pb²⁺. Most importantly, it is easy to separate and recycle the composite microspheres from the detection solution using a commercial magnet, thus avoiding secondary contamination and promoting the practical applications of quantum dots.
- magnetic nanopaticles;CdSe quantum dots;hollow microsphere;layer-by-layer electrostatic self-assembly;heavy ions detection
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