Effect of surface treatment of nanocrystalline CeO2 on its dephosphorylation activity and adsorption of inorganic phosphates

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F44555601%3A13440%2F23%3A43897935" target="_blank" >RIV/44555601:13440/23:43897935 - isvavai.cz</a>
Alternative codes found
RIV/44555601:13520/23:43897935
Result on the web
<a href="https://pubs.acs.org/doi/abs/10.1021/acs.langmuir.3c02576" target="_blank" >https://pubs.acs.org/doi/abs/10.1021/acs.langmuir.3c02576</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acs.langmuir.3c02576" target="_blank" >10.1021/acs.langmuir.3c02576</a>

Result language
angličtina
Original language name
Effect of surface treatment of nanocrystalline CeO2 on its dephosphorylation activity and adsorption of inorganic phosphates
Original language description
The surface of nanocrystalline cerium oxide (CeO2) was treated with various chemical agents by simple post-modification method at 25 oC and atmospheric pressure. Hydrogen peroxide, ammonium persulfate, deionized water, ascorbic and ortho-phosphoric acid were used in order to study and evaluate their effect on surface materials, such as surface area, crystallite size, number of surface hydroxyl groups, particle morphology and Ce3+/Ce4+ ratio. Paraoxon-methyl (PO) decomposition and inorganic phosphate adsorption were used to evaluate the effect of surface treatment on catalytic and adsorption properties. CeO2 surface was studied by Fourier- transform infrared spectroscopy (FTIR), Raman, X-ray photoelectron spectroscopy (XPS) and acid-base titration. While the treatment procedure affected the number of surface hydroxyl groups and the amount of bulk surface oxygen vacancies, only negligible changes were observed in the Ce3+/Ce4+ ratio. Interestingly, surface treatment affected the ability to decompose PO, but only a small effect on inorganic phosphate adsorption was observed, indicating the robustness of CeO2 for the latter. A mechanism of possible interaction of the used chemicals with the CeO2 surface was proposed.
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
21001 - Nano-materials (production and properties)

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)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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