AI Article Synopsis
- A new composite material, ZIF-67@Ce-MOF-600, was created by optimizing the metal-ligand ratio and heat treatment conditions for enhanced performance.
- Advanced techniques like XRD, FT-IR, SEM-EDS, and TEM were used to demonstrate the material's structure and efficacy.
- Under ideal testing conditions, the composite achieved a 99.2% removal rate of tetracycline, sustaining 70.5% effectiveness after five uses, with free radicals significantly contributing to the degradation process.
Article Abstract
A MOF-on-MOF composite derivative material named ZIF-67@Ce-MOF-600 was designed and synthesized. The preparation of ZIF-67@Ce-MOF-600 was optimized from the aspects of the ratio of metal and ligand, heat-treatment temperature. It was demonstrated by XRD, FT-IR, SEM-EDS and TEM. The optimum conditions for the activation of PMS by ZIF-67@Ce-MOF-600 for the degradation of tetracycline (TC) were investigated by adjusting the catalyst dosage, TC, pH, peoxymonosulfate (PMS) concentration, and different kinds of water, co-existing anions and pollution. Under optimal conditions (20 mg catalysts and 50 mg PMS added) in 100 mL of tetracyclines (TC) solvent (20 mg TC/L), the removal rate could reach up to 99.2% and after five cycles was 70.5%. The EPR results indicated the presence of free radicals and non-free radical, among which free radicals intended to play a major role in the degradation process. Its possible degradation pathways and attack sites were analyzed by liquid-phase mass spectrometry and DFT analysis.
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| http://dx.doi.org/10.1016/j.chemosphere.2024.142676 | DOI Listing |
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