| Autor: |
Nguyen, Huynh Thu Thao, Dang, Huynh Giao, Luong, Huynh Vu Thanh, Cao, Luu Ngoc Hanh, Ngo, Truong Ngoc Mai, Pham, Tran Bao Nghi, Nguyen, Trong Tuan, Nguyen, Quoc Chau Thanh, Nguyen, Minh Nhut |
| Zdroj: |
Reaction Kinetics, Mechanisms & Catalysis; Aug2022, Vol. 135 Issue 4, p2099-2114, 16p |
| Abstrakt: |
ZnCo-ZIFs was successfully synthesized by a solvothermal method in methanol solvent at room conditions and determined physical–chemical properties by a series of characterization techniques. The catalytic activity of ZnCo-ZIFs on Methyl Blue (MB) degradation in the presence of peroxymonosulfate (PMS) was examined by variation of the effective factors including ZnCo-ZIFs dosage, mass ratio of ZnCo-ZIFs:PMS, temperature, reaction time and initial MB concentration. The result showed that MB was mostly degraded at initial MB concentration of 50 mg L−1 with catalyst dosage of 50 mg L−1 and ZnCo-ZIFs:PMS ratio of 1:3 at room temperature within 20 min of reaction. The main mechanism for dye degradation was the Fenton-like reaction via major active species SO4·‾ (sulfate free radical) generated from PMS by Co2+ metal centers in the catalyst frameworks. The ZnCo-ZIFs showed highly efficient catalytic activity and stability compared to both homogeneous (cobalt salt, zinc salt and 2-methylimidazole) and heterogeneous (ZIF-67, ZIF-8, zeolite ZMS-5 and activated carbon) catalysts. The recyclability of the catalyst also showed an impressive result with 93.6% at the 5th recycle. To the best of our knowledge, ZnCo-ZIFs associated with PMS was first reported as a novel Fenton-like heterogeneous catalyst for MB degradation in water. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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