Fabrication of a magnetic nanocomposite photocatalysts Fe{sub 3}O{sub 4}@ZIF-67 for degradation of dyes in water under visible light irradiation
As organic dyes are a major group of water pollutants, the development of materials for the removal of dyes is of great significance for the environment. Here, a novel flower-like Fe{sub 3}O{sub 4}@ZIF-67 photocatalyst was synthesized using a simple method at room temperature. It was found that the Fe{sub 3}O{sub 4}@ZIF-67 exhibited the ability of degrading Congo red (CR) quickly under visible light irradiation in a short time after adsorption equilibrium. Free radical trapping experiments revealed that the photo-induced active species superoxide radical (• O{sup 2−}) and holes (h{sup +}) were the predominant active species in the photocatalytic system. In addition, results demonstrated that the Fe{sub 3}O{sub 4}@ZIF-67 can be magnetically recycled, and maintain high photocatalytic activity after reuse over five cycles with no obvious decrease in the removal efficiency. It suggested that the synthesized material had a potentially promising application for CR removal from waste water. - Graphical abstract: A flower-like structure of ZIF-67 loaded with Fe{sub 3}O{sub 4} was synthesized by a facile method. It showed high photocatalysis activity that can degradate congo red (CR) completely in a short time. Display Omitted - Highlights: • A flower-like structure of ZIF-67 was synthesized. • It presents high photocatalytic activity to CR. • The product could be collected conveniently by magnets.
- OSTI ID:
- 22742059
- Journal Information:
- Journal of Solid State Chemistry, Vol. 255; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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