Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 227, Issue -, Pages 583-590Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.12.092
Keywords
Metal-organic frameworks; Cu nanoparticles; Glucose sensor; Nonenzymatic; Stability
Funding
- National Natural Science Foundation of China (NSFC) [21305044]
- Science and Technology Commission of Shanghai Municipality (STCSM) [13510710900]
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In this work, we applied metal-organic frameworks (MOFs) as a porous matrix to encapsulate Cu nanoparticles (NPs) for nonenzymatic glucose sensing in alkaline media. SEM and TEM confirmed that the size of the encapsulated Cu NPs ranges from 2.5 to 5 nm. The hybrid of Cu NPs encapsulated in ZIF-8 (Cu-in-ZIF-8) was further modified onto screen-printed electrodes for nonenzymatic sensing of glucose in alkaline medium. The porous structure of ZIF-8 are beneficial for the unimpeded diffusion of glucose and reaction product. And as a matrix for encapsulating Cu NPs, ZIF-8 also protect the Cu NPs from dissolution and agglomeration during the electrocatalytic process. For comparison, the electrochemical performance of Cu NPs loaded on ZIF-8 (Cu-on-ZIF-8) was also investigated and it is found that Cu-in-ZIF-8 exhibited higher activity and better stability for cyclic test toward the oxidation of glucose in alkaline media. Additionally, Cu-in-ZIF-8 based glucose sensor also shows a favorable sensitivity and selectivity. (C) 2016 Elsevier B.V. All rights reserved.
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