The impact of nanometric Fe2O3 on the magnetic, electronic, and photocatalytic behavior of TiO2@Fe2O3 heterostructures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F23%3A10453492" target="_blank" >RIV/00216208:11310/23:10453492 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Ie_LMrVSlL" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Ie_LMrVSlL</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2022.155186" target="_blank" >10.1016/j.apsusc.2022.155186</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The impact of nanometric Fe2O3 on the magnetic, electronic, and photocatalytic behavior of TiO2@Fe2O3 heterostructures

Popis výsledku v původním jazyce

The synthesis method we used enables the homogeneous deposition of both relatively large and small Fe2O3 nanoparticles on the surface of TiO2. SAED analysis shows that TiO2 NCs crystallize in anatase form and Fe2O3 as hematite in all cases. The formation of a TiO2@Fe2O3 heterostructure leads to an increase in photocatalytic activity (in the presence of H2O2) compared to pure titanium and iron oxides. Mo center dot ssbauer spectra confirm the existence of the hematite structure of Fe2O3 and, together with XPS, the presence of Fe(3+) only. Fe2O3 nano -particles on the surface of TiO2 nanocrystals are in the paramagnetic/superparamagnetic state. Magnetization curves under ZFC and FC conditions also indicate the effect of the size of Fe2O3 particles on the magnetic properties of TiO2@Fe2O3 nanostructures. The magnetic properties of the TiO2@Fe2O3 heterostructure exhibit sensitivity to the size of nanometric Fe2O3 grains. The energies of optical transitions in nanometric Fe2O3 reveal the occurrence of a quantum-size effect. The heterostructures forms a complex structure; on the one hand, at the TiO2 acceptor level associated with the incorporation of Fe(3+) into the structure of TiO2 anatase there is present on the other hand, the microstructure differentiation responsible for the occurrence of three optical transitions in Fe2O3.

Název v anglickém jazyce

The impact of nanometric Fe2O3 on the magnetic, electronic, and photocatalytic behavior of TiO2@Fe2O3 heterostructures

Popis výsledku anglicky

The synthesis method we used enables the homogeneous deposition of both relatively large and small Fe2O3 nanoparticles on the surface of TiO2. SAED analysis shows that TiO2 NCs crystallize in anatase form and Fe2O3 as hematite in all cases. The formation of a TiO2@Fe2O3 heterostructure leads to an increase in photocatalytic activity (in the presence of H2O2) compared to pure titanium and iron oxides. Mo center dot ssbauer spectra confirm the existence of the hematite structure of Fe2O3 and, together with XPS, the presence of Fe(3+) only. Fe2O3 nano -particles on the surface of TiO2 nanocrystals are in the paramagnetic/superparamagnetic state. Magnetization curves under ZFC and FC conditions also indicate the effect of the size of Fe2O3 particles on the magnetic properties of TiO2@Fe2O3 nanostructures. The magnetic properties of the TiO2@Fe2O3 heterostructure exhibit sensitivity to the size of nanometric Fe2O3 grains. The energies of optical transitions in nanometric Fe2O3 reveal the occurrence of a quantum-size effect. The heterostructures forms a complex structure; on the one hand, at the TiO2 acceptor level associated with the incorporation of Fe(3+) into the structure of TiO2 anatase there is present on the other hand, the microstructure differentiation responsible for the occurrence of three optical transitions in Fe2O3.

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

2023

Kód důvěrnosti údajů

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

Název periodika

Applied Surface Science

ISSN

0169-4332

e-ISSN

1873-5584

Svazek periodika

608

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

12

Strana od-do

155186

Kód UT WoS článku

000876921700006

EID výsledku v databázi Scopus

2-s2.0-85139816675