Nanocrystalline cerium oxide for catalytic degradation of paraoxon methyl: Influence of CeO2 surface properties

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388980%3A_____%2F21%3A00545385" target="_blank" >RIV/61388980:_____/21:00545385 - isvavai.cz</a>
Alternative codes found
RIV/44555601:13520/21:43896277
Result on the web
<a href="https://doi.org/10.1016/j.jece.2021.106229" target="_blank" >https://doi.org/10.1016/j.jece.2021.106229</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jece.2021.106229" target="_blank" >10.1016/j.jece.2021.106229</a>

Result language
angličtina
Original language name
Nanocrystalline cerium oxide for catalytic degradation of paraoxon methyl: Influence of CeO2 surface properties
Original language description
Cerium oxide (CeO2) prepared by annealing of carbonate precursor was tested for degradation of paraoxon methyl (PO) and the relationships between its properties (specific surface area, crystallite size, number of hydroxyl groups) and the catalytic activity were investigated. Lewis and Brönsted acidity surface sites were identified by adsorption of specific probe molecules (pyridine, acetonitrile, and acetone) using Fourier-transform infrared spectroscopy (FTIR). The abundance of Lewis type sites was recognized while Brönsted type sites were present to a lesser extent. The highest catalytic activity had the sample annealed at 500 °C that was highly crystalline, but the sample retained high surface area and a suitable number of surface hydroxyl groups established to be in the range 0.165–0.190 mmol g−1. Furthermore, the annealing has a negligible effect on the point of zero charge (PZC) but significantly affected the Brunauer-Emmett-Teller surface area (BET), crystallite size and number of surface hydroxyl groups that significantly affected also the degradation efficiency. Nevertheless, it was found that the amount of residual carbonate species on the CeO2 surface may also have a crucial influence on its catalytic activity.
Czech name
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Czech description
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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

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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