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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/44555601:13520/21:43896277

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10402 - Inorganic and nuclear chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Environmental Chemical Engineering

ISSN

2213-3437

e-ISSN

2213-3437

Svazek periodika

9

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

106229

Kód UT WoS článku

000714642100005

EID výsledku v databázi Scopus

2-s2.0-85113585851