Drop-cast tungsten trioxide semiconducting films in Photoelectrocatalysis

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F20%3A43920686" target="_blank" >RIV/60461373:22310/20:43920686 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S1572665720307293" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1572665720307293</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jelechem.2020.114502" target="_blank" >10.1016/j.jelechem.2020.114502</a>

Result language
angličtina
Original language name
Drop-cast tungsten trioxide semiconducting films in Photoelectrocatalysis
Original language description
Polycrystalline, monoclinic, uniform WO3 films of up to 2.5 μm thickness were prepared by drop casting onto F:SnO2/glass using as precursor peroxo-tungstic acid and polyethylene glycol in water, and firing in air at 520 °C. The n-type WO3 layers produced photocurrents in junctions with aqueous electrolytes. Under depletion conditions, IPCEs (incident photon to current efficiencies) of up to 0.7 at 365 nm and 0.2 at 405 nm were obtained. The photosensitivity of WO3 thin films extended into the visible range up to 470 nm. The photoelectrocatalytic activity of such layers was examined using the azo-dye “acid orange 7” (AO7) as a model pollutant. Degradation of AO7 was carried out under backside UVA broadband illumination of electrodes of 62 cm2 active surface area, in a parallel plate flow-through reactor equipped with a stainless steel counter electrode under electrical bias of 1.1–1.3 V. Rapid recirculation of the electrolyte was maintained in order to derive true kinetic parameters. During illumination, the concentration of AO7 (initial value 1 mM) decreased exponentially. At the beginning of a degradation experiment the Faradaic efficiency, f0, was 0.48. © 2020 Elsevier B.V.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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