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<p>TiO<sub>2</sub> nanotubes (NT-TiO<sub>2</sub>) were doped with different amounts of cerium (Ce-NT-TiO<sub>2</sub>) to study the influence of cerium on their photocatalytic activity for glucose degradation. NT-TiO<sub>2</sub> was synthetized and doped with cerium in one step by the anodic oxidation of Ti plates in non-aqueous electrolytes under potentiostatic conditions, followed by heat treatment. A higher performance of Ce-NT-TiO<sub>2</sub> substrates was observed in glucose oxidation under UV light than under visible illumination. The Ce-NT-TiO<sub>2</sub> substrate, obtained from 0.04% cerium content, achieved the highest glucose oxidation under UV light, achieving 58.5% and 60% of glucose removal at 120&#xa0;min by photocatalysis and photoelectrocatalysis, respectively, indicating that the applied bias potential did not influence the glucose degradation process under the established experimental conditions. The glucose content during glucose oxidation was detected using copper oxide (CuO) nanotubes synthetisized for use as electrochemical glucose sensor. The CuO nanotube electrode exhibited a high stability and reproducibility.</p> Graphical abstract <p></p>

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Photocatalytic degradation of glucose by cerium-doped TiO2 nanotubes and its detection with a CuO nanotube electrochemical sensor

  • 期刊论文

  • 发表日期：

    2025年3月6日

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  • Daysi Elusaí Millán-Ocampo,
  • Carlos A. Pineda-Arellano,
  • Amanda Rodríguez-Álvarez,
  • Susana Silva-Martínez

摘要

TiO2 nanotubes (NT-TiO2) were doped with different amounts of cerium (Ce-NT-TiO2) to study the influence of cerium on their photocatalytic activity for glucose degradation. NT-TiO2 was synthetized and doped with cerium in one step by the anodic oxidation of Ti plates in non-aqueous electrolytes under potentiostatic conditions, followed by heat treatment. A higher performance of Ce-NT-TiO2 substrates was observed in glucose oxidation under UV light than under visible illumination. The Ce-NT-TiO2 substrate, obtained from 0.04% cerium content, achieved the highest glucose oxidation under UV light, achieving 58.5% and 60% of glucose removal at 120 min by photocatalysis and photoelectrocatalysis, respectively, indicating that the applied bias potential did not influence the glucose degradation process under the established experimental conditions. The glucose content during glucose oxidation was detected using copper oxide (CuO) nanotubes synthetisized for use as electrochemical glucose sensor. The CuO nanotube electrode exhibited a high stability and reproducibility.

Graphical abstract