Abstract β-Cyclodextrin (β-CD) with supramolecular recognition capability is widely used as signal amplifier in the fabrication of electrochemical sensor. Unfortunately, its poor electrical conductivity limits its application. To improve its conductivity and increase the loading of β-CD on the modified electrode, in this paper, three-dimensional (3D) porous graphene aerogels (GAs) were introduced as substrate material. The as-prepared β-CD/GAs composite offers high electrical conductivity, large specific surface area of 3D GAs coupled with the excellent adsorption ability of β-CD, and its application as electrochemical sensing platform for Ponceau 4R detection was investigated. Benefiting from the synergy between β-CD and GAs, the β-CD/GAs electrode could detect Ponceau 4R in a wide linear ranging from 1.0 nM to 1.0 μM with a low detection limit of 0.3 nM. Furthermore, the β-CD/GAs electrode also exhibited good anti-interference performance and long term stability, and was capable of detecting Ponceau 4R in the food samples.

中文翻译：

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三维 β-环糊精功能化石墨烯气凝胶：增强型电化学传感平台，用于量化丽春红 4R

摘要 具有超分子识别能力的β-环糊精(β-CD)被广泛用作电化学传感器制造中的信号放大器。不幸的是，其较差的导电性限制了其应用。为了提高其导电性并增加 β-CD 在修饰电极上的负载，本文引入了三维（3D）多孔石墨烯气凝胶（GAs）作为基底材料。所制备的 β-CD/GAs 复合材料具有高导电性、3D GAs 的大比表面积以及 β-CD 的优异吸附能力，研究了其作为 Ponceau 4R 检测电化学传感平台的应用。受益于 β-CD 和 GAs 之间的协同作用，β-CD/GAs 电极可以在 1.0 nM 到 1 的宽线性范围内检测 Ponceau 4R。0 μM，检测下限为 0.3 nM。此外，β-CD/GAs电极还表现出良好的抗干扰性能和长期稳定性，能够检测食品样品中的丽春红4R。