Journal
DIAMOND AND RELATED MATERIALS
Volume 140, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.diamond.2023.110455
Keywords
Gold nanoparticles; Zirconia nanoparticles; Multi-walled carbon nanotubes; Non-enzymatic glucose sensor
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Au/ZrO2@MWCNTs nanoparticles were prepared and showed excellent electrochemical performances as glucose sensors, with a wide linear operating range, high sensitivity, and low detection limit. Additionally, they exhibited strong catalytic activity for glucose conversion to gluconic acid.
Gold (Au) and zirconia (ZrO2) nanoparticles as the co-catalyst on modified multi-walled carbon nanotubes (Au/ ZrO2@MWCNTs) were prepared by simple method. ZrO2 and Au NPs, Au/ZrO2@MWCNTs exhibited excellent electrochemical performances when applied as glucose sensor. The sensor showed a wide linear operating range (10 mu M to 13 mM glucose concentration), high sensitivity (162.52 mu A cm1 2 mM-1 at 10 mu M-13 mM), and a low detection limit (0.95 mu M) at 0.2 V. After 15 days of consecutive tests, over 90.0 % of the original current was retained, verifying the stability of Au/ZrO2@MWCNTs. Furthermore, the non-enzymatic glucose sensor also exhibited strong catalytic activity for the conversion of glucose to gluconic acid with a large active surface area. It is expected to be applicable in the further development of non-enzymatic glucose sensors.
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