Drop-cast tungsten trioxide semiconducting films in Photoelectrocatalysis

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Drop-cast tungsten trioxide semiconducting films in Photoelectrocatalysis

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Drop-cast tungsten trioxide semiconducting films in Photoelectrocatalysis

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

ISSN

1572-6657

e-ISSN

—

Svazek periodika

877

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

000588305500008

EID výsledku v databázi Scopus

2-s2.0-85089338521