Pseudobrookite (Fe2TiO5) films: Synthesis, properties and photoelectrochemical characterization

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00567992" target="_blank" >RIV/61388955:_____/23:00567992 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/23:43925305 RIV/60461373:22350/23:43925305

Výsledek na webu

<a href="https://hdl.handle.net/11104/0339312" target="_blank" >https://hdl.handle.net/11104/0339312</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.cattod.2022.12.013" target="_blank" >10.1016/j.cattod.2022.12.013</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Pseudobrookite (Fe2TiO5) films: Synthesis, properties and photoelectrochemical characterization

Popis výsledku v původním jazyce

Pseudobrookite, Fe2TiO5, precursor films were obtained by spray pyrolysis (SP) at 550 °C on fused silica and FTO (F-doped tin oxide on borosilicate glass) using iron (III) acetylacetonate (FeAcAc) and titanium diisopropoxide bis(acetylacetonate) (DIPTiAcAc) in methanol. SP was followed by annealing in air from 600 °C to 1000 °C for various durations, and for T ≥ 750 °C, phase pure pseudobrookite was obtained. (Photo)electrochemical experiments of Fe2TiO5 electrodes in junctions with aqueous electrolytes showed n-type behaviour of the material with a maximum photocurrent of 0.35 mA/cm2 under simulated AM1.5 sunlight. A valence band energy between 6.6 and 6.8 eV was estimated using the electrochemical results. The position of the Fe2TiO5 valence band enables the passage of (photogenerated) holes in hematite into a pseudobrookite layer and further on towards an electrolyte, if a hematite/pseudobrookite stratified film would be applied in a solid / liquid junction. The valence band potential is not positive enough for producing OH· radicals, only solvent oxidation and reactions which do not require OH· radicals can proceed.

Název v anglickém jazyce

Pseudobrookite (Fe2TiO5) films: Synthesis, properties and photoelectrochemical characterization

Popis výsledku anglicky

Pseudobrookite, Fe2TiO5, precursor films were obtained by spray pyrolysis (SP) at 550 °C on fused silica and FTO (F-doped tin oxide on borosilicate glass) using iron (III) acetylacetonate (FeAcAc) and titanium diisopropoxide bis(acetylacetonate) (DIPTiAcAc) in methanol. SP was followed by annealing in air from 600 °C to 1000 °C for various durations, and for T ≥ 750 °C, phase pure pseudobrookite was obtained. (Photo)electrochemical experiments of Fe2TiO5 electrodes in junctions with aqueous electrolytes showed n-type behaviour of the material with a maximum photocurrent of 0.35 mA/cm2 under simulated AM1.5 sunlight. A valence band energy between 6.6 and 6.8 eV was estimated using the electrochemical results. The position of the Fe2TiO5 valence band enables the passage of (photogenerated) holes in hematite into a pseudobrookite layer and further on towards an electrolyte, if a hematite/pseudobrookite stratified film would be applied in a solid / liquid junction. The valence band potential is not positive enough for producing OH· radicals, only solvent oxidation and reactions which do not require OH· radicals can proceed.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10405 - Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Catalysis Today

ISSN

0920-5861

e-ISSN

1873-4308

Svazek periodika

413-415

Číslo periodika v rámci svazku

MAR 2023

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

4

Strana od-do

113982

Kód UT WoS článku

000955454200001

EID výsledku v databázi Scopus

2-s2.0-85150207015