Insight into crystal-structure dependent charge separation and photo-redox catalysis: A combined experimental and theretical study on Bi(IO3)3 and BiOIO3
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Insight into crystal-structure dependent charge separation and photo-redox catalysis: A combined experimental and theretical study on Bi(IO3)3 and BiOIO3
Original language description
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
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
APPLIED SURFACE SCIENCE
ISSN
0169-4332
e-ISSN
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Volume of the periodical
458
Issue of the periodical within the volume
NOV 15 2018
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
129-138
UT code for WoS article
000441400000016
EID of the result in the Scopus database
2-s2.0-85049772835