| Autor: |
Elgohary, Elzahraa Ahmed, Mohamed, Yasser Mahmoud A., Rabie, Samira Taha, Salih, Said Abdelrahman, Fekry, Amany Mohamed, El Nazer, Hossam A. |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 10/7/2021, Vol. 45 Issue 37, p17301-17312, 12p |
| Abstrakt: |
Irradiation of a series of aromatic epoxides and CO2 in the presence of TiO2, TiO2/MWCNT, Pt//TiO2/MWCNT and Pd/TiO2/MWCNT photocatalysts was investigated with visible light-induced cycloaddition reactions for the production of cyclic carbonates with high activity and selectivity. The catalytic activity order of these catalysts was revealed as follows: Pd/TiO2/MWCNT > Pt//TiO2/MWCNT > TiO2/MWCNT > TiO2. The main features of this protocol are the transformation of CO2 to cyclic carbonates at ambient temperature and under atmospheric pressure. The band gap energies for Pd/TiO2/MWCNT and the Pt/TiO2/MWCNT nanocomposites were estimated from the Kubelka–Munk plots to be ca. ∼2.39 and 2.33 eV, respectively, and they proved to be active catalysts in comparison with bare TiO2 or TiO2/MWCNT, which possess band gap values ca. ∼3.02 and 2.46 eV, respectively. A plausible mechanism explaining the behavior of CO2 with the Pd/TiO2/MWCNT nanocomposite was proposed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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