Quinone-modified NH <subscript>2</subscript> -MIL-101(Fe) composite as a redox mediator for improved degradation of bisphenol A.
In: Journal of hazardous materials, Jg. 324 (2017-02-15), Heft Pt B, S. 665-672
academicJournal
Zugriff:
A novel quinone-modified metal-organic frameworks NH 2 -MIL-101(Fe) was synthesized using a simple chemical method under mild condition. The introduced 2-anthraquinone sulfonate (AQS) can be covalently modified with NH 2 -MIL-101(Fe) and acts as a redox mediator to enhance the degradation of bisphenol A (BPA) via persulfate activation. The obtained AQS-NH-MIL-101(Fe) was characterized by Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectra, cyclic voltammetry and electrochemical impedance spectroscopy. AQS-NH-MIL-101(Fe) exhibited better catalytic performance compared with NH 2 -MIL-101(Fe) and NH 2 -MIL-101(Fe) with free AQS (NH 2 -MIL-101(Fe)/AQS). That is, AQS-NH-MIL-101(Fe) was proved to be the most effective in that more than 97.7% of BPA was removed. The degradation rate constants (k) of AQS-NH-MIL-101(Fe) was 9-fold higher than that of NH 2 -MIL-101(Fe) and 7-fold higher than NH 2 -MIL-101(Fe)/AQS, indicating that AQS is a great electron-transfer mediator when modified with NH 2 -MIL-101(Fe). Based on the above results, the possible mechanism of catalytic reaction has been investigated in view of the trapping experiments. In addition, the AQS-NH-MIL-101(Fe) catalyst exhibited excellent stability and can be used several times without significant deterioration in performance.
(Copyright © 2016 Elsevier B.V. All rights reserved.)
Titel: |
Quinone-modified NH <subscript>2</subscript> -MIL-101(Fe) composite as a redox mediator for improved degradation of bisphenol A.
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Autor/in / Beteiligte Person: | Li, X ; Guo, W ; Liu, Z ; Wang, R ; Liu, H |
Zeitschrift: | Journal of hazardous materials, Jg. 324 (2017-02-15), Heft Pt B, S. 665-672 |
Veröffentlichung: | Amsterdam : Elsevier,, 2017 |
Medientyp: | academicJournal |
ISSN: | 1873-3336 (electronic) |
DOI: | 10.1016/j.jhazmat.2016.11.040 |
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