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<p>The effect of modification of nanostructured TiO<sub>2</sub> films with lanthanum ions on their electrocatalytic, photoelectrochemical, and sensor properties is investigated. La-TiO<sub>2</sub> films were prepared by sol–gel method and characterized by X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscopy and photoelectrochemical current spectroscopy. It is shown that modification with lanthanum ions leads to an increase in the photosensitivity of La-TiO<sub>2</sub> electrodes in the UV range and a batochromic shift in the photocurrent spectra, and also improves their catalytic activity in the reaction of oxygen reduction and sensor properties in determining the concentration of heavy metal ions in liquids.</p>

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Electrocatalytic, Photoelectrochemical, and Sensor Properties of Nanostructured TiO2 Films Modified with Lanthanum Ions

  • 期刊论文

  • 发表日期：

    2025年3月1日

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  • V. S. Vorobets,
  • G. Ya. Kolbasov,
  • I. A. Medyk,
  • S. V. Karpenko,
  • T. V. Kryshchuk,
  • O. P. Ivanenko

摘要

The effect of modification of nanostructured TiO2 films with lanthanum ions on their electrocatalytic, photoelectrochemical, and sensor properties is investigated. La-TiO2 films were prepared by sol–gel method and characterized by X-ray diffraction analysis, X-ray photoelectron spectroscopy, scanning electron microscopy and photoelectrochemical current spectroscopy. It is shown that modification with lanthanum ions leads to an increase in the photosensitivity of La-TiO2 electrodes in the UV range and a batochromic shift in the photocurrent spectra, and also improves their catalytic activity in the reaction of oxygen reduction and sensor properties in determining the concentration of heavy metal ions in liquids.