Photoelectrochemical degradation of selected organic substances on Fe2O3 photoanodes: a comparison with TiO2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F23%3A43925301" target="_blank" >RIV/60461373:22310/23:43925301 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22350/23:43925301

Výsledek na webu

<a href="https://link.springer.com/article/10.1007/s43630-022-00324-x" target="_blank" >https://link.springer.com/article/10.1007/s43630-022-00324-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s43630-022-00324-x" target="_blank" >10.1007/s43630-022-00324-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Photoelectrochemical degradation of selected organic substances on Fe2O3 photoanodes: a comparison with TiO2

Popis výsledku v původním jazyce

The photoelectrochemical degradation of selected aromatic substances, acid orange 7 (AO7), salicylic acid (SA), benzoic acid (BA), and 4-chlorophenol (4-CP) was studied on hematite (α-Fe2O3) and compared with titanium dioxide (TiO2), both deposited as thin films on conducting substrates (FTO/glass). Batch type reactors were used under backside and front side illumination. Electrical bias was applied on the semiconducting electrodes, such that only valence band processes leading to oxidative pathways were followed. The initial Faradaic efficiency, f0, of degradation processes was determined from the UV–Vis absorbance decrease of the starting materials. f0 for 1 mM AO7 degradation in 0.01 M sulphuric acid was found to be 7.5%. When the pH of the solution was neutral (pH 7.2) or alkaline (pH 13), f0 decreased to 1.7%. For 1 mM SA, f0 was 6.2% on hematite photoanodes and 6.1% on titanium dioxide. For 1 mM benzoic acid and 4-chlorophenol, f0 was an order of magnitude lower, but only on hematite. This is ascribed to the lack of OH· radical formation on hematite, which seems to be essential for the photooxidation of these compounds.

Název v anglickém jazyce

Photoelectrochemical degradation of selected organic substances on Fe2O3 photoanodes: a comparison with TiO2

Popis výsledku anglicky

The photoelectrochemical degradation of selected aromatic substances, acid orange 7 (AO7), salicylic acid (SA), benzoic acid (BA), and 4-chlorophenol (4-CP) was studied on hematite (α-Fe2O3) and compared with titanium dioxide (TiO2), both deposited as thin films on conducting substrates (FTO/glass). Batch type reactors were used under backside and front side illumination. Electrical bias was applied on the semiconducting electrodes, such that only valence band processes leading to oxidative pathways were followed. The initial Faradaic efficiency, f0, of degradation processes was determined from the UV–Vis absorbance decrease of the starting materials. f0 for 1 mM AO7 degradation in 0.01 M sulphuric acid was found to be 7.5%. When the pH of the solution was neutral (pH 7.2) or alkaline (pH 13), f0 decreased to 1.7%. For 1 mM SA, f0 was 6.2% on hematite photoanodes and 6.1% on titanium dioxide. For 1 mM benzoic acid and 4-chlorophenol, f0 was an order of magnitude lower, but only on hematite. This is ascribed to the lack of OH· radical formation on hematite, which seems to be essential for the photooxidation of these compounds.

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

<a href="/cs/project/GA20-11635S" target="_blank" >GA20-11635S: Pokročilé oxidické polovodičové fotoelektrody pro konverzi sluneční energie a úpravu vody</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Photochemical &amp; Photobiological Sciences

ISSN

1474-905X

e-ISSN

1474-9092

Svazek periodika

22

Číslo periodika v rámci svazku

Neuvedeno

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

419-426

Kód UT WoS článku

000877397100002

EID výsledku v databázi Scopus

2-s2.0-85141102873