Non-enzymatic detection of glucose using ternary NiFeCo-Glycerolate supported on graphite electrodes

Author(s):Show less -

Lima, Irlan S. ; Oliveira, Thawan G. ; Choquehuanca-Azana, Astrid ; Espinoza-Torres, Sergio ; Otto, Enzo M. ; Batista, Mateus A. ; Oliveira, Giovane J. ; Silva, Mayara O. ; Verlangieri, Ivan ; Goncalves, Josue M. ; Angnes, Lucio

• Document type: Journal article
• Source: MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS; v. 319, p. 8-pg., 2025-04-24.

Abstract

A ternary metal-glycerolate combined with a low-cost platform electrode was demonstrated as an effective sensor for glucose analysis. The hybrid organic-inorganic NiFeCo-Glycerolate was fabricated by one-step solvothermal treatment. The proposed process produces microspheres with an average size of similar to 1 mu m that were extensively characterized by X-ray diffraction, FTIR, TGA, XPS, TEM, and SEM-EDS techniques. The combination of a scalable synthesis with a cost-effective conductive platform is an interesting strategy for the development of an enzyme-free glucose electrochemical sensor. Experiments employing chronoamperometry demonstrated a good linearity of response in the concentration range of 100 to 600 mu mol L-1, with a detection and quantification limit of 6.20 and 20.5 mu mol L-1, respectively. The developed sensor was utilized to quantify glucose in a synthetic urine sample, with a recovery rate of 105 +/- 3 %, and a current retention of 94.8 % in an interval of time of 24 h. Thus, highlighting the potential of ternary metal-glycerolates allied to a low-cost platform in glucose sensing. (AU)

• FAPESP's process: 14/50867-3 - INCT 2014: National Institute of Science and Technology in Bioanalysis
• Grantee: Marco Aurelio Zezzi Arruda
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 23/17560-0 - Designing new high-entropy coordination compounds via spray-drying and their derivatives for energy conversion and storage
• Grantee: Josué Martins Gonçalves
• Support Opportunities: Research Grants - Young Investigators Grants
• FAPESP's process: 22/04127-4 - Alpha metallic hydroxides vs. metallic glycerolates: synthesis, properties and applications
• Grantee: Irlan dos Santos Lima
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)