Encapsulating Cu nanoparticles into metal-organic frameworks for nonenzymatic glucose sensing
Encapsulating Cu nanoparticles into metal-organic frameworks for nonenzymatic glucose sensing
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DOI：
10.1016/j.snb.2015.12.092
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发表时间：
2016-05-01
影响因子：
8.4
通讯作者：
Lan, Minbo
中科院分区：
文献类型：
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作者：
Shi, Libo;Zhu, Xiang;Lan, Minbo
在这项工作中，我们应用金属有机框架（MOF）作为多孔基质来封装铜纳米颗粒（NP），用于碱性介质中的非酶葡萄糖传感。 SEM 和 TEM 证实封装的 Cu NP 的尺寸范围为 2.5 至 5 nm。封装在 ZIF-8 中的 Cu NP 杂化物 (Cu-in-ZIF-8) 被进一步修饰到丝网印刷电极上，用于碱性介质中的葡萄糖非酶传感。 ZIF-8的多孔结构有利于葡萄糖和反应产物的无阻碍扩散。作为封装 Cu NP 的基质，ZIF-8 还可以保护 Cu NP 在电催化过程中免于溶解和团聚。为了进行比较，还研究了负载在ZIF-8上的Cu纳米粒子（Cu-on-ZIF-8）的电化学性能，发现Cu-in-ZIF-8在碱性介质中葡萄糖氧化的循环测试中表现出更高的活性和更好的稳定性。此外，基于Cu-in-ZIF-8的葡萄糖传感器还表现出良好的灵敏度和选择性。 (C) 2016 Elsevier B.V. 保留所有权利。
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.