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Combination of cobalt ferrite and graphene: High-performance and recyclable visible-light photocatalysis

Paper ID Volume ID Publish Year Pages File Format Full-Text
46473 46440 2012 8 PDF Available
Title
Combination of cobalt ferrite and graphene: High-performance and recyclable visible-light photocatalysis
Abstract

A straightforward strategy was designed for the fabrication of magnetically separable CoFe2O4-graphene photocatalysts with differing graphene content. It is very interesting that the combination of CoFe2O4 nanoparticles with graphene results in a dramatic conversion of the inert CoFe2O4 into a highly active catalyst for the degradation of methylene blue (MB), Rhodamine B (RhB), methyl orange (MO), active black BL-G and active red RGB under visible-light irradiation. The significant enhancement in photoactivity under visible-light irradiation can be ascribed to reduction of graphene oxide, because the photogenerated electrons of CoFe2O4 can transfer easily from the conduction band to the reduced graphene oxide, effectively preventing a direct recombination of electrons and holes. Hydroxyl radicals play the role of main oxidant in the CoFe2O4-graphene system and the radicals’ oxidation reaction is obviously dominant. CoFe2O4 nanoparticles themselves have a strong magnetic property, which can be used for magnetic separation in a suspension system, and therefore the introduction of additional magnetic supports is no longer necessary.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► A magnetically separable CoFe2O4-graphene photocatalyst was successfully synthesized. ► The combination of CoFe2O4 nanoparticles with graphene results in a dramatic conversion of the inert CoFe2O4 into a highly active catalyst for the degradation of organic dyes. ► The significant enhancement in photoactivity under visible-light irradiation can be ascribed to reduction of graphene oxide.

Keywords
Cobalt ferrite; Graphene; Photocatalyst; Magnetic separation; Visible-light irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 280–287
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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