Insight into crystal-structure dependent charge separation and photo-redox catalysis: A combined experimental and theretical study on Bi(IO3)3 and BiOIO3

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F18%3A43954208" target="_blank" >RIV/49777513:23640/18:43954208 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.apsusc.2018.07.054" target="_blank" >http://dx.doi.org/10.1016/j.apsusc.2018.07.054</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.apsusc.2018.07.054" target="_blank" >10.1016/j.apsusc.2018.07.054</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Insight into crystal-structure dependent charge separation and photo-redox catalysis: A combined experimental and theretical study on Bi(IO3)3 and BiOIO3

Popis výsledku v původním jazyce

Solar-driven conversion for CO2 reduction and oxygen activation reactions show huge potentials for energetic and environmental applications. However, the influence of crystal structure of a photocatalyst on its photocatalytic performance has been seldom investigated so far. Herein, to probe the relationship between crystal structure and photocatalytic properties, two bismuth iodates, the centrosymmetric (CS) monoclinic Bi(IO3)3 and noncentrosymmetric (NCS) orthorhombic BiOIO3 are employed as the models. The photocatalytic reduction and oxidation capabilities of Bi(IO3)3 and BiOIO3 were surveyed by monitoring the CO2 reduction and oxygen activation reactions. The results revealed that BiOIO3 shows far superior photocatalytic activity than Bi(IO3)3, which can more efficiently convert CO2 into CO and produce larger amounts of [rad]O2 − and [rad]OH. The experimental characterizations and DFT calculations councovered that much more efficient charge separation and migration occur in BiOIO3 in compared to Bi(IO3)3, which are responsible for the obviously higher photoactivity of BiOIO3. This is mainly due to that the NCS crystal structure of BiOIO3 that gives rise to a large macroscopic polarization, facilitating the separation of photogenerated electron-hole pairs. The microscopic first hyperpolarizability for BiOIO3 was calculated to be 2.56 × 10−30 esu for the dominant component at the static limit and 15.73 × 10−30 esu at the wavelength 409.1 nm, which well verifies the strong polarization of BiOIO3. This study may furnish the perspective into designing high-performance photocatalytic materials on the basis of crystal structure engineering

Název v anglickém jazyce

Insight into crystal-structure dependent charge separation and photo-redox catalysis: A combined experimental and theretical study on Bi(IO3)3 and BiOIO3

Popis výsledku anglicky

Solar-driven conversion for CO2 reduction and oxygen activation reactions show huge potentials for energetic and environmental applications. However, the influence of crystal structure of a photocatalyst on its photocatalytic performance has been seldom investigated so far. Herein, to probe the relationship between crystal structure and photocatalytic properties, two bismuth iodates, the centrosymmetric (CS) monoclinic Bi(IO3)3 and noncentrosymmetric (NCS) orthorhombic BiOIO3 are employed as the models. The photocatalytic reduction and oxidation capabilities of Bi(IO3)3 and BiOIO3 were surveyed by monitoring the CO2 reduction and oxygen activation reactions. The results revealed that BiOIO3 shows far superior photocatalytic activity than Bi(IO3)3, which can more efficiently convert CO2 into CO and produce larger amounts of [rad]O2 − and [rad]OH. The experimental characterizations and DFT calculations councovered that much more efficient charge separation and migration occur in BiOIO3 in compared to Bi(IO3)3, which are responsible for the obviously higher photoactivity of BiOIO3. This is mainly due to that the NCS crystal structure of BiOIO3 that gives rise to a large macroscopic polarization, facilitating the separation of photogenerated electron-hole pairs. The microscopic first hyperpolarizability for BiOIO3 was calculated to be 2.56 × 10−30 esu for the dominant component at the static limit and 15.73 × 10−30 esu at the wavelength 409.1 nm, which well verifies the strong polarization of BiOIO3. This study may furnish the perspective into designing high-performance photocatalytic materials on the basis of crystal structure engineering

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

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

—

Svazek periodika

458

Číslo periodika v rámci svazku

NOV 15 2018

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

10

Strana od-do

129-138

Kód UT WoS článku

000441400000016

EID výsledku v databázi Scopus

2-s2.0-85049772835