Immobilized Ferrous Ion and Glucose Oxidase on Graphdiyne and Its Application on One-Step Glucose Detection,ACS Applied Materials & Interfaces

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Immobilized Ferrous Ion and Glucose Oxidase on Graphdiyne and Its Application on One-Step Glucose Detection
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-04-30 00:00:00 , DOI: 10.1021/acsami.8b03118
Jiaming Liu _{1,

2} , Xiaomei Shen ₃ , Didar Baimanov _{1,

2} , Liming Wang ₁ , Yating Xiao _{1,

2} , Huibiao Liu ₄ , Yuliang Li ₄ , Xingfa Gao ₃ , Yuliang Zhao _{1,

2} , Chunying Chen _{1,

2}

Affiliation

Graphdiyne (GDY) is a novel two-dimensional (2D) carbon allotrope with sp-hybridized carbon atoms and hexagonal rings. Because of its unique structure and electronic property, GDY was reported as a promising candidate applied in energy storage, catalysis, biosensing and so on. However, using GDY as a platform to immobilize metal ion or enzyme was still not reported. Here, we presented a GDY-based composite with dual-enzyme activity by immobilizing ferrous ion and glucose oxidase onto GDY sheet. GDY showed great adsorption capacity and maintained the high catalytic activity of ferrous ion. The ferrous ion preferred to adsorb in between the neighboring two C–C triple bonds of GDY with lower adsorption energy (−5.64 eV) if compared to graphene (−1.69 eV). Meanwhile, GDY exhibited the ability of adsorbing glucose oxidase while did not obviously influence the structure and catalytic activity of the enzyme. The as-prepared composite was successfully used in one-step blood glucose detection. This work provides a new insight on ion and enzyme immobilization by 2D material.

中文翻译：

固定在石墨二炔上的亚铁离子和葡萄糖氧化酶及其在一步法葡萄糖检测中的应用

Graphdiyne（Graphyyne，GDY）是一种新型的二维（2D）碳同素异形体，具有sp杂化的碳原子和六角环。由于其独特的结构和电子性能，GDY被报告为在能量存储，催化，生物传感等方面应用的有前途的候选物。但是，仍没有报道使用GDY作为固定金属离子或酶的平台。在这里，我们通过将亚铁离子和葡萄糖氧化酶固定在GDY片材上，提出了一种具有双重酶活性的GDY基复合材料。GDY表现出很大的吸附能力，并保持了亚铁离子的高催化活性。与石墨烯（-1.69 eV）相比，亚铁离子优选以较低的吸附能（-5.64 eV）吸附在GDY的相邻两个CC三键之间。同时，GDY具有吸附葡萄糖氧化酶的能力，而对葡萄糖的结构和催化活性没有明显的影响。所制备的复合物已成功用于一步式血糖检测。这项工作为二维材料固定离子和酶提供了新的见解。

更新日期：2018-04-30

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