House-of-cards composites of MWW monolayers and TiO2 nanoparticles with (photo)catalytic activity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F24%3A10487122" target="_blank" >RIV/00216208:11310/24:10487122 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=gBekw_F2t8" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=gBekw_F2t8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apmt.2024.102473" target="_blank" >10.1016/j.apmt.2024.102473</a>
Alternative languages
Result language
angličtina
Original language name
House-of-cards composites of MWW monolayers and TiO2 nanoparticles with (photo)catalytic activity
Original language description
The exfoliation of layered zeolites affording monolayer nanosheets in solution enables for the first time preparation of molecularly intimate composites of zeolites with other components like nanoparticles, other layers, etc. This ability is not possible with the conventional 3D and even solid 2D zeolite forms. It allows synthesizing composites with desired combination of functionalities and additional benefits like open accessible architectures. The present article illustrates this novel approach by reporting the preparation of catalysts comprising 2.5 nm thick monolayers of the zeolite MWW and TiO2 nanoparticles with approximate diameter 4-8 nm. The chosen ratio is 1:1 w/w but it is readily adjustable to different values if desired. Two solutions of exfoliated zeolite MWW monolayers were used: as-made and after purification by dialysis. The composites precipitated upon mixing with TiO2 nanoparticle solutions. TEM investigation confirmed random mixing of the components producing house-ofcards structures. The composites were additionally characterized by X-ray powder diffraction, nitrogen sorption and FTIR. The efficacy of the new approach was demonstrated through testing in two catalytic oxidation reactions, and both showed advantage over the equivalent physical mixture of the components. One of the test reactions, diphenyl sulfide oxidation by H2O2 revealed both catalytic (in the dark) and photocatalytic (with irradiation) activity. The hydroxylation of terephthalic acid occurred by radical oxidation. The presented approach can be applied to design desired systems, e.g., with other semiconductors to allow more precise control not only of the content in mixed phases but also of optical and electronic properties of these materials.
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
10403 - Physical 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
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Materials Today
ISSN
2352-9407
e-ISSN
2352-9415
Volume of the periodical
41
Issue of the periodical within the volume
December
Country of publishing house
GB - UNITED KINGDOM
Number of pages
12
Pages from-to
102473
UT code for WoS article
001335261900001
EID of the result in the Scopus database
2-s2.0-85205949113