Apparent quantum yield - Key role of spatial distribution of irradiation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F23%3A10252416" target="_blank" >RIV/61989100:27360/23:10252416 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27710/23:10252416 RIV/60461373:22340/23:43928200

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/abs/pii/S0926860X23001461?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0926860X23001461?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apcata.2023.119166" target="_blank" >10.1016/j.apcata.2023.119166</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Apparent quantum yield - Key role of spatial distribution of irradiation

Popis výsledku v původním jazyce

Based on the apparent quantum yield, photocatalytic activities are compared under various experimental conditions. However, their assessment from experimental data requires knowing the intensity of incident light, which generally differs from that emitted by a radiation source. Most reports provide apparent quantum yields derived from emission intensity, leading to inaccurate, and often strongly underestimated, figures. To correlate differences between emitted and incident light intensity, we measured local light intensity at discrete points of an incident surface, approximated its spatial distribution by linear interpolation and extrapolation, calculated total incident light energy by integration, and compared this value with that given by irradiation source manufacturer. The calculated incident light energy was lower than that provided by the manufacturers of all irradiation sources tested. Due to this refinement (lower energy), the obtained apparent quantum yields are actually higher, even 5 times higher in case of LED radiation, than those calculated using manufacturer data. (C) 2023 Elsevier B.V.

Název v anglickém jazyce

Apparent quantum yield - Key role of spatial distribution of irradiation

Popis výsledku anglicky

Based on the apparent quantum yield, photocatalytic activities are compared under various experimental conditions. However, their assessment from experimental data requires knowing the intensity of incident light, which generally differs from that emitted by a radiation source. Most reports provide apparent quantum yields derived from emission intensity, leading to inaccurate, and often strongly underestimated, figures. To correlate differences between emitted and incident light intensity, we measured local light intensity at discrete points of an incident surface, approximated its spatial distribution by linear interpolation and extrapolation, calculated total incident light energy by integration, and compared this value with that given by irradiation source manufacturer. The calculated incident light energy was lower than that provided by the manufacturers of all irradiation sources tested. Due to this refinement (lower energy), the obtained apparent quantum yields are actually higher, even 5 times higher in case of LED radiation, than those calculated using manufacturer data. (C) 2023 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10406 - Analytical chemistry

Projekt

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

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

Applied Catalysis A: General

ISSN

0926-860X

e-ISSN

0926-860X

Svazek periodika

658

Číslo periodika v rámci svazku

May

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

—

Kód UT WoS článku

001015684300001

EID výsledku v databázi Scopus

2-s2.0-85151310663