Construction of BiOI/Bi2Fe4O9 heterojunction for visible-light-activated antibacterial: Photocatalytic sterilization of one plus one is greater than two
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F25%3A43932200" target="_blank" >RIV/60461373:22310/25:43932200 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2452262725000170" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452262725000170</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.flatc.2025.100823" target="_blank" >10.1016/j.flatc.2025.100823</a>
Alternative languages
Result language
angličtina
Original language name
Construction of BiOI/Bi2Fe4O9 heterojunction for visible-light-activated antibacterial: Photocatalytic sterilization of one plus one is greater than two
Original language description
Semiconductor photocatalysts with narrow band gaps are usually handicapped in scenarios involving visiblelight photocatalytic sterilization due to the rapid recombination of photogenerated electron-hole pairs, sluggish carrier transfer kinetics, and limited reaction active sites. To address these issues, heterojunction engineering was employed to construct heterojunction photocatalyst by coupling two visible-light-activated layered photocatalysts (i.e., an n-type layered BiOI semiconductor and a p-type layered Bi2Fe4O9 semiconductor) for pathogen photoinactivation, aiming at achieving "one plus one is greater than two" photocatalytic antibacterial effect. The bacterial survival rates for single BiOI and Bi2Fe4O9 irradiated under visible light for 60 min were 54.4 % and 55.8 %, respectively. In contrast, the flower-like BiOI/Bi2Fe4O9 heterojunction with optimized component ratio possessed the lowest bacterial survival rate (2.2 %), indicating that the antibacterial activity of the coupled heterojunction photocatalyst is more than twice that of each single component photocatalyst. The instrumental results and density functional theory calculations reveal that the synergistic effect among (i) high sunlight absorption from two visible-light-activated photocatalysts, (ii) high specific surface area from the two layered materials and flower-like nanostructure, and (iii) the formation of the built-in electric field at the interface of BiOI/Bi2Fe4O9 heterojunction contributes to boosting photocatalytic antibacterial performance. Finally, we elucidate the mechanism behind the improved charge separation and transfer kinetics, center dot O2- and center dot OH production, and photocatalytic sterilization activity. This work offers a novel material design concept of "one plus one is greater than two", which may pave the way for the development of heterojunction photocatalysts for wastewater treatment and purification.
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
10402 - Inorganic and nuclear chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
FlatChem
ISSN
2452-2627
e-ISSN
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Volume of the periodical
50
Issue of the periodical within the volume
March 2025
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
nestránkováno
UT code for WoS article
001413472500001
EID of the result in the Scopus database
2-s2.0-85216250122