Photocatalytic water splitting over CeO2/Fe2O3/Ver photocatalysts
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F21%3A10247555" target="_blank" >RIV/61989100:27710/21:10247555 - isvavai.cz</a>
Alternative codes found
RIV/00216275:25310/21:39918015
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0196890421003320?casa_token=4DaOiXHalUQAAAAA:55oMxhb9KCogkDxLXjK3HObXv7bPQeGu9NI7mtBDUq999mIRI7164Bs66qdR-SqWPN0a-yGZYlA" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0196890421003320?casa_token=4DaOiXHalUQAAAAA:55oMxhb9KCogkDxLXjK3HObXv7bPQeGu9NI7mtBDUq999mIRI7164Bs66qdR-SqWPN0a-yGZYlA</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.enconman.2021.114156" target="_blank" >10.1016/j.enconman.2021.114156</a>
Alternative languages
Result language
angličtina
Original language name
Photocatalytic water splitting over CeO2/Fe2O3/Ver photocatalysts
Original language description
The study is focused on the photocatalytic ability of nanocrystalline oxides Fe2O3 and CeO2 (marked as Fe and Ce) and their 8:2, 5:5 and 2:8 M ratio mixtures (marked as Fe8Ce2, Fe5Ce5 and Fe2Ce8) for the hydrogen production via water splitting. The photocatalysts were prepared using a precipitation procedure both in a "standalone" powder form and in form of the Fe2O3/CeO2 nanoparticles precipitated on vermiculite (Ver). The phase composition and the specific surface area of the samples, the size and morphology of nanocrystallites of individual phases, and the optical and electronic properties of the photocatalysts were characterized in detail by Xray powder diffraction, nitrogen physisorption, transmission electron microscopy, diffuse reflectance UV-Vis spectroscopy and work function measurements. Photocatalytic water splitting over the photocatalysts was performed during 8 h in annular batch photoreactor illuminated with 8 W Hg lamp (lambda = 254 nm). The most active photocatalysts were Fe8Ce2 both in "stand-alone" powder form and in form of the photocatalyst attached on vermiculite. The photocatalytic generation of hydrogen in the presence of the Fe2O3/CeO2 photocatalysts is controlled by the intrinsic photocatalytic properties of the oxides and by the specific surface of the composite. It is enhanced, when heterojunctions between Fe2O3 and CeO2 form. The work function measurements confirmed the formation of heterojunction Type I with bent bands, which effectively inhibits the recombination of photogenerated charge carriers. In addition, it was confirmed that the anchoring of the photocatalyst on vermiculite does not significantly degrade the photocatalytic activity of the composite. In contrast, even if the amount of the photocatalytically active component was three-times smaller as compared with the photocatalysts without vermiculite, just a slight decrease of the photocatalytic activity was observed.
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
20300 - Mechanical engineering
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
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Energy Conversion and Management
ISSN
0196-8904
e-ISSN
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Volume of the periodical
238
Issue of the periodical within the volume
June
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
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UT code for WoS article
000649672000008
EID of the result in the Scopus database
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