Composite TiO2 films modified by CeO2 and SiO2 for the photocatalytic removal of water pollutants

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925304" target="_blank" >RIV/60461373:22310/22:43925304 - isvavai.cz</a>

Alternative codes found

RIV/60461373:22350/22:43925304

Result on the web

<a href="https://link.springer.com/article/10.1007/s43630-022-00283-3" target="_blank" >https://link.springer.com/article/10.1007/s43630-022-00283-3</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s43630-022-00283-3" target="_blank" >10.1007/s43630-022-00283-3</a>

Result language

angličtina

Original language name

Composite TiO2 films modified by CeO2 and SiO2 for the photocatalytic removal of water pollutants

Original language description

TiO2 particles of high photocatalytic activity immobilised on various substrates usually suffer from low mechanical stability. This can be overcome by the utilisation of an inorganic binder and/or incorporation in a robust hydrophobic matrix based on rare-earth metal oxides (REOs). Furthermore, intrinsic hydrophobicity of REOs may result in an increased affinity of TiO2-REOs composites to non-polar aqueous pollutants. Therefore, in the present work, three methods were used for the fabrication of composite TiO2/CeO2 films for photocatalytic removal of dye Acid Orange 7 and the herbicide monuron, as representing polar and non-polar pollutants, respectively. In the first method, the composition of a paste containing photoactive TiO2 particles and CeCl3 or Ce(NO3)3 as CeO2 precursors was optimised. This paste was deposited on glass by doctor blading. The second method consisted of the deposition of thin layers of CeO2 by spray coating over a particulate TiO2 photocatalyst layer (prepared by drop casting or electrophoresis). Both approaches lead to composite films of similar photoactivity that of the pure TiO2 layer, nevertheless films made by the first approach revealed better mechanical stability. The third method comprised of modifying a particulate TiO2 film by an overlayer based on colloidal SiO2 and tetraethoxysilane serving as binders, TiO2 particles and cerium oxide precursors at varying concentrations. It was found that such an overlayer significantly improved the mechanical properties of the resulting coating. The use of cerium acetylacetonate as a CeO2 precursor showed only a small increase in photocatalytic activity. On the other hand, deposition of SiO2/TiO2 dispersions containing CeO2 nanoparticles resulted in significant improvement in the rate of photocatalytic removal of the herbicide monuron. Graphical abstract: [Figure not available: see fulltext.]. © 2022, The Author(s), under exclusive licence to European Photochemistry Association, European Society for Photobiology.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10402 - Inorganic and nuclear chemistry

Project

<a href="/en/project/LTAIZ19011" target="_blank" >LTAIZ19011: Nano particulate photocatalysts embedded in hydrophobic matrices for treatment of turbid wastewater containing non-polar, non-biodegradable compounds</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2022

Confidentiality

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

Name of the periodical

Photochemical &amp; Photobiological Sciences

ISSN

1474-905X

e-ISSN

1474-9092

Volume of the periodical

21

Issue of the periodical within the volume

12

Country of publishing house

GB - UNITED KINGDOM

Number of pages

12

Pages from-to

2127-2138

UT code for WoS article

000842202800001

EID of the result in the Scopus database

2-s2.0-85136298066