Effect of surface treatment of nanocrystalline CeO2 on its dephosphorylation activity and adsorption of inorganic phosphates
Identifikátory výsledku
Kód výsledku v 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>
Nalezeny alternativní kódy
RIV/44555601:13520/23:43897935
Výsledek na webu
<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>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Effect of surface treatment of nanocrystalline CeO2 on its dephosphorylation activity and adsorption of inorganic phosphates
Popis výsledku v původním jazyce
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.
Název v anglickém jazyce
Effect of surface treatment of nanocrystalline CeO2 on its dephosphorylation activity and adsorption of inorganic phosphates
Popis výsledku anglicky
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.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
21001 - Nano-materials (production and properties)
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2023
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Langmuir
ISSN
0743-7463
e-ISSN
—
Svazek periodika
2024
Číslo periodika v rámci svazku
40
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
15
Strana od-do
302-316
Kód UT WoS článku
001139433600001
EID výsledku v databázi Scopus
2-s2.0-85180950096