Tetrahedrally modified MnMe0.1Co1.9O4 (Me = Zn, Mg, Li) spinels for non-enzymatic glucose sensing

Krystian Lankauf, Katarzyna Ostrowska, Karolina Górnicka, Jakub Karczewski, Piotr Jasiński, Sebastian Molin

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this work, tetrahedrally modified MnMe0.1Co1.9O4 (Me = Zn, Mg, Li) spinels were prepared via the sol–gel synthesis method with subsequent ball-milling fragmentation. The prepared samples were evaluated as glucose–sensing catalyst. The reference MnCo2O4 spinel exhibited a sensitivity of 49 µA mM−1 cm−2 and a nonlinearity error of 5.2% in the response range from 0.02 to 1 mM. The partial substitution of cobalt in the reference spinel enhanced the glucose–sensing abilities, and the sample with Li was found to be the most active catalyst, exhibiting a sensitivity of 73.1 µA mM−1 cm−2. Finally, the proposed material was tested for selectivity in the presence of interfering sucrose.

Original languageEnglish
Article number132574
JournalMaterials Letters
Volume323
DOIs
StatePublished - Sep 15 2022
Externally publishedYes

Funding

The presented research is part of the “Nanocrystalline ceramic materials for efficient electrochemical energy conversion” project, carried out within the First TEAM programme of the Foundation for Polish Science (grant agreement nr. POIR.04.04.00-00-42E9/17-00), co–financed by the European Union under the European Regional Development Fund. Funding from the Statutory Funds of WETI PG is also acknowledged. This publication was developed under the provision of the Polish Ministry of Education and Science project: “Support for research and development with the use of research infrastructure of the National Synchrotron Radiation Centre SOLARIS” under contract nr. 1/SOL/2021/2. We acknowledge the SOLARIS Centre for the access to the Beamline PIRX, where the measurements were performed.

Keywords

  • Cation substitution
  • Glucose sensor
  • Spinel

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