TiO2 nanotubes modified with cadmium oxide for photoelectrocatalytic oxidation of alcohols
https://doi.org/10.17586/2220-8054-2025-16-3-352-363
Abstract
TiO2 nanotube (TNT) electrodes were fabricated by electrochemical anodization of titanium in ethylene glycol electrolyte with added NH4F (0.5 wt.%) and water (2 % w/w). The (TNT)-cadmium oxide (CdO) composite was fabricated using potentiostatic cathodic deposition. Structural properties of the obtained coatings have been investigated by scanning electron microscopy and X-Ray photoelectron spectroscopy, Raman spectroscopy, X-Ray diffraction and transmission electron microscopy. The TNT-CdO electrode demonstrates high efficiency in photoelectrochemical degradation of methanol, ethylene glycol, glycerol and sorbitol in aqueous solutions of 0.1 M Na2SO4 upon irradiation by a simulated sunlight. The highest photooxidation currents were obtained for sorbitol. Intensity-modulated photocurrent spectroscopy shows that the photoelectrocatalysis efficiency is due to suppression of the electron-hole pairs’ recombination and to increase in the rate of photo-induced charge transfer. Thus, the TNT-CdO composite is an effective photoanode for developing the technology of photoelectrochemical degradation of sorbitol and other alcohols by-products of biofuel production.
Keywords
Nanotubes,
TiO2–CdO composite,
photoelectrocatalytic oxidation,
methanol,
ethylene glycol,
glycerol,
sorbitol
Supporting agencies: This research was financially supported by the Ministry of Science and Higher Education of the Russian Federation and performed using the equipment of the Center for Collective Use of Physical Investigation Methods of the IPCE RAS.
About the Authors
V. A. Grinberg
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Vitali A. Grinberg
Leninsky Prospekt 31, Building 4, 119071 Moscow
V. V. Emets
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Victor V. Emets
Leninsky Prospekt 31, Building 4, 119071 Moscow
A. V. Shapagin
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Aleksey V. Shapagin
Leninsky Prospekt 31, Building 4, 119071 Moscow
A. A. Averin
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Aleksey A. Averin
Leninsky Prospekt 31, Building 4, 119071 Moscow
A. A. Shiryaev
Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences
Russian Federation
Russian Federation
Andrei A. Shiryaev
Leninsky Prospekt 31, Building 4, 119071 Moscow
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Grinberg V.A., Emets V.V., Shapagin A.V., Averin A.A., Shiryaev A.A. TiO2 nanotubes modified with cadmium oxide for photoelectrocatalytic oxidation of alcohols. Nanosystems: Physics, Chemistry, Mathematics. 2025;16(3):352-363. https://doi.org/10.17586/2220-8054-2025-16-3-352-363
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