Defect-Mediated Energy States in Brookite Nanorods: Implications for Photochemical Applications under Ultraviolet and Visible Light

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F24%3A10255054" target="_blank" >RIV/61989100:27640/24:10255054 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15640/24:73624984

Výsledek na webu

<a href="https://pubs.acs.org/doi/epdf/10.1021/acs.jpcc.4c01066" target="_blank" >https://pubs.acs.org/doi/epdf/10.1021/acs.jpcc.4c01066</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.jpcc.4c01066" target="_blank" >10.1021/acs.jpcc.4c01066</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Defect-Mediated Energy States in Brookite Nanorods: Implications for Photochemical Applications under Ultraviolet and Visible Light

Popis výsledku v původním jazyce

The photochemical properties of brookite nanorods are systematically explored using light-induced electron-paramagnetic resonance (EPR) techniques at different wavelengths spanning the UV-vis region of the electromagnetic spectrum (355-650 nm). Under UV irradiation, electron-hole pairs are generated, leading to the stabilization of paramagnetic centers, primarily Ti3+ and O- species at the surface. Visible light irradiation at low temperature results in a unique pair of EPR signals, including electrons trapped at titanium cations and a distinct signal resonating at g = 2.004. The pair of signals disappears after annealing at room temperature, indicating that recombination pathways with trapped electrons are available. The chemical reactivity of the different photogenerated species is tested using electron and holes scavengers. While peculiar light-harvesting capabilities are observed for the brookite nanorods, experiments carried out in the presence of a hole scavenger indicate a limited potential for oxidative processes under visible light.

Název v anglickém jazyce

Defect-Mediated Energy States in Brookite Nanorods: Implications for Photochemical Applications under Ultraviolet and Visible Light

Popis výsledku anglicky

The photochemical properties of brookite nanorods are systematically explored using light-induced electron-paramagnetic resonance (EPR) techniques at different wavelengths spanning the UV-vis region of the electromagnetic spectrum (355-650 nm). Under UV irradiation, electron-hole pairs are generated, leading to the stabilization of paramagnetic centers, primarily Ti3+ and O- species at the surface. Visible light irradiation at low temperature results in a unique pair of EPR signals, including electrons trapped at titanium cations and a distinct signal resonating at g = 2.004. The pair of signals disappears after annealing at room temperature, indicating that recombination pathways with trapped electrons are available. The chemical reactivity of the different photogenerated species is tested using electron and holes scavengers. While peculiar light-harvesting capabilities are observed for the brookite nanorods, experiments carried out in the presence of a hole scavenger indicate a limited potential for oxidative processes under visible light.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry C

ISSN

1932-7447

e-ISSN

1932-7455

Svazek periodika

128

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

6971-6978

Kód UT WoS článku

001203933300001

EID výsledku v databázi Scopus

2-s2.0-85190837722