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ZIF-assisted construction of magnetic multiple core-shell Fe3O4@ZnO@N-doped carbon composites for effective photocatalysis
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
Shanghai Univ, Peoples R China.
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2019 (English)In: Chemical Engineering Science, ISSN 0009-2509, E-ISSN 1873-4405, Vol. 209, article id 115185Article in journal (Refereed) Published
Abstract [en]

Magnetic Fe3O4@ZnO@nitrogen-doped carbon (Fe3O4@ZnO@N-C) composites with multiple core-shell structures have been successfully synthesized by calcination of ZIF-8 coated Fe3O4@ZnO core-shell nanocrystals. The morphologies and microstructural characteristics are investigated by X-ray diffraction, Fourier-transform infrared spectrometer, transmission electron microscopy, X-ray photoelectron spectroscopy, physical adsorption of nitrogen, and UV-vis diffuse reflectance spectroscopy. The photocatalytic performances are tested by degrading methylene blue (MB) in aqueous solutions under the irradiation of imitative sunlight. The photocatalytic trials indicate that the Fe3O4@ZnO@N-C composites exhibit improved degradation efficiency compared to the Fe3O4@ZnO precursor. The photocatalytic efficiencies of the as-prepared Fe3O4@ZnO@N-C composites towards MB are 93% under irradiation of imitative sunlight for 90 min and still maintained to be 87% after 6 recycles, which shows very good stability and recyclability. Nitrogen-doped carbon is believed to extend the absorption spectra to the visible-light region. The photodegradation kinetics via using the as-prepared Fe3O4@ZnO@N-C composite as a novel photocatalyst are systematically investigated. (C) 2019 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
PERGAMON-ELSEVIER SCIENCE LTD , 2019. Vol. 209, article id 115185
Keywords [en]
Fe3O4; ZnO; ZIF-8; Nitrogen-doped carbon; Photocatalysis; Magnetic recovery
National Category
Inorganic Chemistry
Identifiers
URN: urn:nbn:se:liu:diva-162934DOI: 10.1016/j.ces.2019.115185ISI: 000502087500042OAI: oai:DiVA.org:liu-162934DiVA, id: diva2:1382372
Note

Funding Agencies|National Natural Science Foundation of ChinaNational Natural Science Foundation of China [21601120, 11375111]; Science and Technology Commission of Shanghai MunicipalityScience & Technology Commission of Shanghai Municipality (STCSM) [17ZR1410500, 19ZR1418100]; Swedish Government strategic faculty grant in material sciencee (SFO, MATLIU) in Advanced Functional Materials (AFM) [5.1-2015-5959]

Available from: 2020-01-02 Created: 2020-01-02 Last updated: 2020-01-02

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