Direct Electrochemical Behaviors of Glucose Oxidase on Hollow Porous Gold Nanoparticles/Reduced Graphene Oxide Nanocomposite and Its Biosensing Application
Scientific Papers|更新时间:2023-04-17
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Direct Electrochemical Behaviors of Glucose Oxidase on Hollow Porous Gold Nanoparticles/Reduced Graphene Oxide Nanocomposite and Its Biosensing Application
Journal of Instrumental AnalysisVol. 42, Issue 3, Pages: 315-322(2023)
YIN Xue-hu,YANG Xin-jie,LUO Dan,et al.Direct Electrochemical Behaviors of Glucose Oxidase on Hollow Porous Gold Nanoparticles/Reduced Graphene Oxide Nanocomposite and Its Biosensing Application[J].Journal of Instrumental Analysis,2023,42(03):315-322.
YIN Xue-hu,YANG Xin-jie,LUO Dan,et al.Direct Electrochemical Behaviors of Glucose Oxidase on Hollow Porous Gold Nanoparticles/Reduced Graphene Oxide Nanocomposite and Its Biosensing Application[J].Journal of Instrumental Analysis,2023,42(03):315-322. DOI: 10.19969/j.fxcsxb.22110703.
Direct Electrochemical Behaviors of Glucose Oxidase on Hollow Porous Gold Nanoparticles/Reduced Graphene Oxide Nanocomposite and Its Biosensing Application
Hollow porous gold nanoparticles(HPAuNPs) were prepared by a simple solution phase sacrificial template method.The hollow porous gold nanoparticles/reduced graphene oxide(HPAuNPs/rGO) nanocomposite was prepared for the effective immobilization of glucose oxidase(GOx) on the surface of glassy carbon electrode(GCE).An electrochemical biosensor for detection of glucose was constructed based on GOx/HPAuNPs/rGO modified GCE.Scanning and transmission electron microscopy,X-ray photoelectron spectroscopy,X-ray diffraction spectroscopy,infrared spectroscopy and electrochemistry were used to characterize the morphology and structure of the nanomaterial,the immobilization process of GOx,and the direct electrochemical behaviors and the electrocatalytic properties of the biosensor.The results showed that the HPAuNPs/rGO nanocomposite could effectively accelerate the direct electron transfer(DET) between GOx and electrode due to the synergy effect of HPAuNPs and rGO.The modified electrode exhibited an excellent electrocatalytic property for glucose determination.The response current was proportional to the concentration of glucose in the range of 0.05-7.0 mmol/L,with a detection limit(,S/N ,= 3) of 16 μmol/L.With good selectivity,reproducibility and stability,the proposed biosensor could satisfy the demands for glucose detection in real serum sample,with recoveries of 98.0%-103%,and relative standard deviations(RSDs) not more than 5.0%.
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