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Synthesis and characterization of new NaX zeolite-supported Nb, Zn, and Fe photocatalysts activated by visible radiation for application in wastewater treatment

Paper ID Volume ID Publish Year Pages File Format Full-Text
54443 47009 2015 8 PDF Available
Title
Synthesis and characterization of new NaX zeolite-supported Nb, Zn, and Fe photocatalysts activated by visible radiation for application in wastewater treatment
Abstract

•The Nb, Zn, and Fe oxides photoactivated for sunlight was supported in NaX.•The decreasing bandgap was resulted in the method impregnated and thermal treatment.•The synergistic effect between Nb2O5/NaX was much more pronounced.•Nb2O5 adhered to the zeolite matrix.•The goethite supported on NaX generated a photocatalyst activated by visible energy.

NaX zeolite-supported Nb2O5, ZnO, and FexOy photocatalysts were synthesized with the objective of producing photocatalysts that could be activated by visible/sunlight. The photocatalysts were prepared by wet impregnation with 10% (w/w) precursor. X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy were used to investigate the crystalline and electronic structures of the supported photocatalysts. The results obtained showed that Nb2O5 impregnation resulted in a synergistic effect with the zeolite matrix forming Nb2O5/NaX with a bandgap of 2.9 eV, which is lower than that of bulk Nb2O5 (3.2 eV). The synthesized β-FexOy (goethite) active-phase supported on NaX acted as a photocatalyst that could be activated by visible energy photons. A photocatalytically active phase was not observed for ZnO/NaX. Nb2O5- and β-FexOy-impregnated zeolite structures formed potential photocatalysts that absorb radiation with ultraviolet and visible wavelengths.

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Keywords
Bandgap; Zeolite; Nb2O5; ZnO; Goethite
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Synthesis and characterization of new NaX zeolite-supported Nb, Zn, and Fe photocatalysts activated by visible radiation for application in wastewater treatment
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 240, Part A, 1 February 2015, Pages 168–175
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