Thin-Film Nanocrystalline Zinc Oxide Photoanode Modified with CdO in Photoelectrocatalytic Degradation of Alcohols

Thin-film nanocrystalline zinc oxide electrodes were fabricated by electrochemical deposition of ZnO on FTO-coated glass slides. ZnO electrodes were promoted by CdO coating on top of ZnO in amounts corresponding to 0.8, 0.1, and 0.05 C cm−2 in electric units. Modification of ZnO by a small amount of...

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Published inCoatings (Basel) Vol. 13; no. 6; p. 1080
Main Authors Grinberg, Vitali A, Emets, Victor V, Modestov, Alexander D, Averin, Aleksey A, Shiryaev, Andrei A
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2023
Subjects
Alcohol
Alcohols
Biofuels
Cadmium
Charge transfer
Degradation
Dielectric films
Electrodes
Electrolytes
Ethylene glycol
Glass substrates
Glycerin
Glycerol
Light
Nanocrystals
Oxidation
Photoanodes
Photocatalysis
Photodegradation
Photoelectric effect
Photovoltaic cells
Pollutants
Semiconductors
Spectrum analysis
Thin films
Work stations
Zinc oxide
Zinc oxides
United States > US
Germany
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Summary:Thin-film nanocrystalline zinc oxide electrodes were fabricated by electrochemical deposition of ZnO on FTO-coated glass slides. ZnO electrodes were promoted by CdO coating on top of ZnO in amounts corresponding to 0.8, 0.1, and 0.05 C cm−2 in electric units. Modification of ZnO by a small amount of CdO, corresponding to 0.05 C cm−2, shifts the photoactivity of the composite photoanode into the visible part of the solar spectrum. It is shown that the ZnO/(0.05C)CdO/FTO electrode demonstrates high efficiency in photoelectrochemical degradation of methanol, ethylene glycol, and glycerol when irradiated by a simulated sunlight. According to intensity-modulated photocurrent spectroscopy (IMPS), the effect is due to suppression of the electron–hole pairs recombination and increase in the rate of photo-induced charge transfer. Therefore, thin-film photoanodes based on zinc oxide modified by CdO can be used for photoelectrochemical degradation of byproducts of biofuel production glycerol, and of other alcohols.
ISSN:2079-6412
2079-6412
DOI:10.3390/coatings13061080