Co7Fe3/CoFe2O4@C Lamellar composites derived from Co–Fe LDH/PVA as an effective heterogeneous activator of peroxymonosulfate
| Autor: | Yuanming Deng, Jiaoning Tang, Zairan Liu, Xi Zou, Jinzhi Wang, Zhong Wang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Nanocomposite
Elution Mechanical Engineering Radical Metals and Alloys Alcohol 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Ion Catalysis chemistry.chemical_compound chemistry Mechanics of Materials Materials Chemistry Lamellar structure Composite material 0210 nano-technology Scavenging |
| Zdroj: | Journal of Alloys and Compounds. 854:157244 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2020.157244 |
| Popis: | Here we present a simple method to prepare a highly efficient three components nanocomposites via thermal degradation of layered double metal hydroxides (LDHs)@polyvinyl alcohol (PVA) composites. Co7Fe3/CoFe2O4@C obtained from this method is applied to activate peroxymonosulfate (PMS) to degrade polluted organics and showed excellent performance. The best removal RhB efficiency of Co7Fe3/CoFe2O4@C (Co/Fe = 1:1) is near 100% within 10 min and the lowest ions elution (∼0.05 mg/L) under pH = 7, which is also better than the performance of the precursor Co–Fe LDH. Through further cycling experiments and degradation of p-nitrophenol, the stability and catalytic performance of the catalyst were verified. Finally, free radical scavenging experiments prove ·OH and SO4·- radicals participating in the reaction, which are the key factors for degradation. Based on the above, the derivation of the mechanism of Co7Fe3/CoFe2O4@C (Co/Fe = 1:1) catalyzing PMS to degrade polluted organics was proposed, and we consider this catalyst has great application prospect. |
| Databáze: | OpenAIRE |
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