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Mimetic Ag nanoparticle/Zn-based MOF nanocomposite (AgNPs@ZnMOF) capped with molecularly imprinted polymer for the selective detection of patulin
- Source :
- Talanta. 179
- Publication Year :
- 2017
-
Abstract
- Here, Ag nanoparticle/flake-like Zn-based MOF nanocomposite (AgNPs@ZnMOF) with great peroxidase-like activity was applied as an efficient support for molecularly imprinted polymer (MIP) and successfully used for selective determination of patulin. AgNPs@ZnMOF was simply synthesized by creating Ag nanoparticles (Ag NPs) inside the nano-pores of flake-like (Zn)MOF. The high surface area of MOF remarkably improved the catalytic activity of Ag NPs which was assessed by fluorometric, colorimetric and electrochemical techniques. Furthermore, it was observed that patulin could strangely reduce the catalytic activity of AgNPs@ZnMOF, probably due to its electron capturing features. This outcome was the motivation to design an assay for patulin detection. In order to make a selective interaction with patulin molecules, MIP layer was created on the surface of AgNPs@ZnMOF by co-polymerization reaction of 3-aminopropyl triethoxysilane (APTES) and tetraethyl orthosilicate (TEOS) monomers wherein patulin was applied as template agent. Combination between the selective identifying feature of MIP and outstanding peroxidase-like activity of novel AgNPs@ZnMOF nanocomposite as well as the sensitive fluorescence detection system was led to the design of a reliable probe for patulin. The prepared MIP-capped AgNPs@ZnMOF catalyzed the H2O2-terephthalic acid reaction which produced a high florescent product. In the presence of patulin, the fluorescence intensity was decreased proportional to its concentration in the range of 0.1-10µmolL-1 with a detection limit of 0.06µmolL-1. The proposed method was able to selectively measure patulin in a complex media without significant interfering effects from analogue compounds.
- Subjects :
- Silver
Phthalic Acids
Nanoparticle
Metal Nanoparticles
02 engineering and technology
01 natural sciences
Catalysis
Analytical Chemistry
Nanocomposites
Patulin
Molecular Imprinting
chemistry.chemical_compound
Biomimetic Materials
Limit of Detection
Peroxidase
Detection limit
Nanocomposite
Propylamines
010401 analytical chemistry
Molecularly imprinted polymer
Hydrogen Peroxide
Silanes
021001 nanoscience & nanotechnology
0104 chemical sciences
Tetraethyl orthosilicate
Zinc
Monomer
Spectrometry, Fluorescence
chemistry
Triethoxysilane
0210 nano-technology
Nuclear chemistry
Mutagens
Subjects
Details
- ISSN :
- 18733573
- Volume :
- 179
- Database :
- OpenAIRE
- Journal :
- Talanta
- Accession number :
- edsair.doi.dedup.....b4c29424b07a601e97c41eb2f8161d72