Dong Lili, Ren Suxia, Zhang Xiuqiang, Yang Yantao, Wu Qinglin, Lei Tingzhou
Institute of Urban and Rural Mining, Changzhou University, Changzhou 213164, China.
Henan Key Laboratory of Biomass Energy, Zhengzhou 450008, China.
Carbohydr Polym. 2023 Mar 1;303:120463. doi: 10.1016/j.carbpol.2022.120463. Epub 2022 Dec 17.
In recent years, nanocellulose-based bioinorganic nanohybrids have been exploited in numerous applications due to their unique nanostructure, excellent catalytic properties, and good biocompatibility. To the best of our knowledge, this is the first report on the simple and effective synthesis of graphene/cellulose (RGO/CNC) matrix-supported platinum nanoparticles (Pt NPs) for nonenzymatic electrochemical glucose sensing. The Pt/RGO/CNC nanohybrid presented a porous network structure, in which Pt NPs, RGO, and CNCs were integrated well. Here, cellulose nanocrystals act as a biocompatible framework for wrapped RGO and monodispersed Pt nanoparticles, effectively preventing the restacking of graphene during reduction. The superior glucose sensing performance of Pt/RGO/CNC modified glass carbon electrode (GCE) was achieved with a linear concentration range from 0.005 to 8.5 mM and a low detection limit of 2.1 μM. Moreover, the Pt/RGO/CNC/GCE showed remarkable sensitivity, selectivity, durability, and reproducibility. The obtained results indicate that the CNCs-based bioinorganic nanohybrids could be a promising electrode material in electrochemical biosensors.
近年来，基于纳米纤维素的生物无机纳米杂化物因其独特的纳米结构、优异的催化性能和良好的生物相容性而被广泛应用于众多领域。据我们所知，这是首次关于简单有效地合成用于非酶电化学葡萄糖传感的石墨烯/纤维素（还原氧化石墨烯/纤维素纳米晶）基质负载铂纳米颗粒（Pt NPs）的报道。Pt/RGO/CNC纳米杂化物呈现出多孔网络结构，其中Pt NPs、RGO和CNCs良好地结合在一起。在这里，纤维素纳米晶体作为包裹RGO和单分散Pt纳米颗粒的生物相容性框架，有效地防止了还原过程中石墨烯的重新堆叠。Pt/RGO/CNC修饰玻碳电极（GCE）具有优异的葡萄糖传感性能，线性浓度范围为0.005至8.5 mM，检测限低至2.1 μM。此外，Pt/RGO/CNC/GCE表现出显著的灵敏度、选择性、耐久性和重现性。所得结果表明，基于CNCs的生物无机纳米杂化物可能是电化学生物传感器中有前景的电极材料。
