A novel enzyme-free glucose and H2O2 sensor based on 3D graphene aerogels decorated with Ni3N nanoparticles
MetadataShow full item record
© 2018 Elsevier B.V. In this work, a novel enzyme-free glucose and hydrogen peroxide (H2O2) sensor based on Ni3N nanoparticles on conductive 3D graphene aerogels (Ni3N/GA) has been successfully synthesized by using hydrothermal reaction, freeze-dried and then calcined under NH3atmosphere. The obtained Ni3N/GA composites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption–desorption isotherms and electrochemical methods. The results show the obtained 3D Ni3N/GA composites exhibit excellent electrochemical performance toward glucose oxidation and H2O2reduction with larger catalytic rate constant Kcatvalue of 3.75 × 103M-1s-1and 1.24 × 103M-1s-1, respectively. As a glucose sensor, the obtained electrode provides a wide detection range of 0.1–7645.3 µM, fast response time within 3 s, high sensitivity of 905.6 µA mM-1cm-2and low detection limit of 0.04 µM. For detection of H2O2, this prepared sensor offers a wide detection range (5 µM–75.13 mM), fast response time (within 5 s), sensitivity (101.9 µA mM-1cm-2) and low detection limit (1.80 µM). This enzyme-free glucose and H2O2sensor display satisfactory selectivity, reproducibility and long-term storage stability. Additionally, the sensor can also be used for glucose and H2O2detection in human blood serum. The results demonstrate that 3D GA nanostructures provide an enviable conductive network for efficient charge transfer and avoid Ni3N nanoparticles aggregation, which is advantageous for electrocatalytic applications.
Showing items related by title, author, creator and subject.
Zhu, H.; Li, L.; Zhou, W.; Shao, Zongping; Chen, X. (2016)© The Royal Society of Chemistry.Glucose sensors have been extensively developed because of their broad applications, especially in diabetes diagnosis. Up to date, electrochemical enzymatic glucose sensors are commonly ...
Formation and characteristics of glucose oligomers during the hydrolysis of cellulose in hot-compressed waterYu, Yun (2009)Energy production from fossil fuels results in significant carbon dioxide emission, which is a key contributor to global warming and the problems related to climate change. Biomass is recognized as an important part of ...
Fu, X.; Sale, M.; Ding, B.; Lewis, W.; Silvester-Dean, Debbie ; Ling, C.D.; D'Alessandro, D.M. (2022)Regular detection of blood glucose levels is a critical indicator for effective diabetes management. Owing to the intrinsic highly sensitive nature of enzymes, the performance of enzymatic glucose sensors is typically ...