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Systematic study on preparation of copper nanoparticle embedded porous carbon by carbonization of metal–organic framework for enzymatic glucose sensor

机译：金属-有机骨架炭化制备葡萄糖纳米粒嵌入多孔碳的系统研究

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摘要

Recently, metal–organic frameworks (MOFs) have been widely used in the preparation of metal oxide-embedded porous carbon composite materials. However, non-oxidized metal nanoparticle embedded porous carbon composites have rarely been prepared from MOFs to date. Herein, we present a systematic synthetic condition study of a Cu nanoparticle embedded porous carbon composite (Cu@C-500) by simple carbonization of a copper-based MOF (HKUST-1). The conditions for the synthesis of the pure Cu nanoparticles embedded composite were optimized by changing the reaction temperature and time. The prepared composite retained its original octahedron shape, with uniformly distributed copper nanoparticles (～30 nm) in the carbon bed. The composite Cu@C-500 exhibited hierarchical porosity with a moderate surface area (195 m2 g?1). Due to its hierarchical porosity and unique redox activity, Cu@C-500 was examined for peroxidase-like catalytic activity, particularly for glucose sensing assays. The results indicated that this carbon composite displayed high catalytic activity similar to that of the peroxidase enzyme. Moreover, it presented one of the best detection limits (3.2 × 10?9 M) in colorimetric glucose sensing. In addition, Cu@C-500 exhibited good selectivity towards other sugars. The high sensitivity and selectivity of Cu@C-500 show great potential in the development of highly efficient glucose sensing devices.
机译：最近，金属有机骨架（MOF）已广泛用于制备嵌入金属氧化物的多孔碳复合材料。然而，迄今为止，很少由MOF制备非氧化的金属纳米颗粒嵌入的多孔碳复合材料。本文中，我们通过对铜基MOF（HKUST-1）的简单碳化，提出了对Cu纳米颗粒嵌入的多孔碳复合材料（Cu @ C-500）的系统合成条件研究。通过改变反应温度和时间优化了纯铜纳米粒子嵌入复合材料的合成条件。制备的复合材料保留了其原始的八面体形状，并在碳层中均匀分布了铜纳米颗粒（约30 nm）。 Cu @ C-500复合材料具有中等孔隙率（195 m 2 g ？1 ）。由于其分级的孔隙率和独特的氧化还原活性，对Cu @ C-500的过氧化物酶样催化活性进行了检测，尤其是用于葡萄糖感测法。结果表明，该碳复合材料显示出与过氧化物酶相似的高催化活性。此外，它是比色葡萄糖感测的最佳检测限之一（3.2×10 ？9 M）。另外，Cu @ C-500对其他糖类表现出良好的选择性。 Cu @ C-500的高灵敏度和选择性在开发高效葡萄糖传感设备方面​​显示出巨大潜力。

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