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Synthesis and photocatalytic application of visible-light active β-Fe2O3/g-C3N4 hybrid nanocomposites

Paper ID Volume ID Publish Year Pages File Format Full-Text
45099 46396 2016 10 PDF Available
Title
Synthesis and photocatalytic application of visible-light active β-Fe2O3/g-C3N4 hybrid nanocomposites
Abstract

•G-C3N4 was efficiently hybridized with Fe2O3 nanoparticles at the metastable β-phase.•The hybrids present superior activity under solar and visible light irradiation.•The photocatalytic mechanism is different in the β-Fe2O3/g-C3N4 and the pure g-C3N4.•The optical properties and charge carriers separation are improved.

Hybrid organic/inorganic nanocomposites comprised of nanocrystalline iron oxide at the metastable β-phase and graphitic carbon nitride (g-C3N4) were prepared via a facile in-situ growth strategy embedded in a solid state process. The hybridized β-Fe2O3/g-C3N4 nanomaterials were thoroughly characterized by a variety of techniques, including UV–vis absorption, nitrogen physisorption, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). Their photocatalytic activity was evaluated under both simulated solar light and pure visible light irradiation against the photodegradation of methyl orange (MO), rhodamine B (RhB) and phenol. The prepared β-Fe2O3/g-C3N4 nanocomposites were proven durable and significantly more efficient than the single components. The β-Fe2O3 content in the final material was tuned to optimize the photocatalytic performance, with particular attention to the activity under visible light. The enhanced photoactivity was attributed to a) the improved optical properties of the prepared nanocomposites, presenting narrower band-gap energies and increased visible light absorption efficiency, and b) to the efficient separation of the photoinduced charge carriers driven by the matched band edges in the heterostructure. The predominant active species responsible for the photodegradation activity were determined and a possible mechanism is proposed.

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Keywords
β-Fe2O3; g-C3N4; Heterojunction; Hybrid; Composite; Photocatalysis
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Synthesis and photocatalytic application of visible-light active β-Fe2O3/g-C3N4 hybrid nanocomposites
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 187, 15 June 2016, Pages 171–180
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us