| Autor: |
Huan-Yan XU, Yuan WANG, Tian-Nuo SHI, Hang ZHAO, Qu TAN, Bo-Chao ZHAO, Xiu-Lan HE, Shu-Yan QI |
| Zdroj: |
Frontiers of Materials Science; Mar2018, Vol. 12 Issue 1, p34-44, 11p |
| Abstrakt: |
The kinetics and Fenton-like mechanism are two challenging tasks for heterogeneous Fenton-like catalytic oxidation of organic pollutants. In this study, three kinetic models were used for the kinetic studies of Fe3O4/MWCNTs-H2O2 Fenton-like reaction for MO degradation. The results indicated that this reaction followed the firstorder kinetic model. The relationship of reaction rate constant and temperature followed the Arrhenius equation. The activation energy and frequency factor of this system were calculated as 8.2 kJ.mol-1 and 2.72 s-1, respectively. The quantifications of Fe ions dissolution and .OH radicals generation confirmed that the homogeneous and heterogeneous catalyses were involved in Fe3O4/MWCNTs-2O2 Fenton-like reaction. The reaction rate constant was closely related with Fe ions dissolution and .OH radicals generation. Fe3O4/MWCNTs nanocomposites had typical ferromagnetic property and could be easily separated from solution by an external magnet after being used. Furthermore, Fe3O4/MWCNTs nanocomposites exhibited good stability and recyclability. Finally, the Fenton-like mechanisms on homogeneous and heterogeneous catalyses were described. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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