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Facile Synthesis of Eggshell Membrane-Templated Au/CeO2 3D Nanocomposite Networks for Nonenzymatic Electrochemical Dopamine Sensor.
Nanoscale Research Letters ( IF 5.5 ) Pub Date : 2020-01-29 , DOI: 10.1186/s11671-019-3203-8
Qingquan Liu 1 , Xiaoyu Chen 1 , Ze-Wen Kang 2 , Chaohui Zheng 1 , Da-Peng Yang 1, 2
Affiliation  

Dopamine acts as a neurotransmitter to regulate a variety of physiological functions of the central nervous system. Thus, the fabrication of electrochemical active nanomaterials for sensitive dopamine detection is extremely important for human health. Herein, we constructed a highly efficient dopamine nonenzymatic biosensor using eggshell membrane (ESM) as a 3D network-like carrier-loaded Au and CeO2 nanocomposites. This approach has led to the uniform distribution of CeO2 and Au nanoparticles on the surface of ESM. The structure and properties of the as-prepared ESM templated Au/CeO2 (ESM-AC) nanocomposites were characterized. The electrochemical properties of non-enzymatic oxidation of dopamine by ESM-AC electrode were studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The detection limit of the ESM-AC modified electrode for dopamine is 0.26 μM with a linear range from 0.1 to 10 mM. The ESM-AC-modified electrode performs a higher catalytic activity for dopamine electrocatalytic oxidation than that ESM-templated CeO2 (ESM-C) electrode, which is mainly due to the unique structure of ESM and more active sites provided from Au. Collectively, this biological waste-ESM provides a cheap and unique template for the preparation of 3D network-like nanostructures and expands the application in electrochemical dopamine detection. ESM-AC nanocomposites prepared from biological waste was successfully modified on the surface of glassy carbon electrode and a dopamine-based electrochemical biosensor was constructed.

中文翻译:

用于非酶电化学多巴胺传感器的蛋壳膜模板化Au / CeO2 3D纳米复合网络的简便合成。

多巴胺可作为神经递质来调节中枢神经系统的各种生理功能。因此,用于灵敏多巴胺检测的电化学活性纳米材料的制造对于人类健康极为重要。在这里,我们构建了一个高效的多巴胺非酶生物传感器,它使用蛋壳膜(ESM)作为3D网络状载体负载的Au和CeO2纳米复合材料。这种方法已导致CeO2和Au纳米粒子在ESM表面均匀分布。表征了所制备的ESM模板化Au / CeO2(ESM-AC)纳米复合材料的结构和性能。通过循环伏安法(CV)和差示脉冲伏安法(DPV)研究了ESM-AC电极对多巴胺的非酶氧化反应的电化学性能。ESM-AC修饰电极对多巴胺的检出限为0.26μM,线性范围为0.1至10 mM。与ESM模板的CeO2(ESM-C)电极相比,ESM-AC修饰的电极对多巴胺电催化氧化的催化活性更高,这主要是由于ESM的独特结构以及Au提供的更多活性位。总之,这种生物废物-ESM为制备3D网络状纳米结构提供了便宜而独特的模板,并扩大了在电化学多巴胺检测中的应用。利用生物废料制备的ESM-AC纳米复合材料在玻碳电极表面成功改性,并构建了基于多巴胺的电化学生物传感器。与ESM模板的CeO2(ESM-C)电极相比,ESM-AC修饰的电极对多巴胺电催化氧化的催化活性更高,这主要是由于ESM的独特结构以及Au提供的更多活性位。总之,这种生物废物-ESM为制备3D网络状纳米结构提供了便宜而独特的模板,并扩大了在电化学多巴胺检测中的应用。利用生物废料制备的ESM-AC纳米复合材料在玻碳电极表面成功改性,并构建了基于多巴胺的电化学生物传感器。与ESM模板的CeO2(ESM-C)电极相比,ESM-AC修饰的电极对多巴胺电催化氧化的催化活性更高,这主要是由于ESM的独特结构以及Au提供的更多活性位。总之,这种生物废物-ESM为制备3D网络状纳米结构提供了便宜而独特的模板,并扩大了在电化学多巴胺检测中的应用。利用生物废料制备的ESM-AC纳米复合材料在玻碳电极表面成功改性,并构建了基于多巴胺的电化学生物传感器。这种生物废物-ESM为制备3D网络状纳米结构提供了便宜而独特的模板,并扩大了在电化学多巴胺检测中的应用。利用生物废料制备的ESM-AC纳米复合材料在玻碳电极表面成功改性,并构建了基于多巴胺的电化学生物传感器。这种生物废物-ESM为制备3D网络状纳米结构提供了便宜而独特的模板,并扩大了在电化学多巴胺检测中的应用。利用生物废料制备的ESM-AC纳米复合材料在玻碳电极表面成功改性,并构建了基于多巴胺的电化学生物传感器。
更新日期:2020-01-30
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