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High catalytic activity of magnetic FeOx/NiOy/SBA-15: The role of Ni in the bimetallic oxides at the nanometer level

Paper ID Volume ID Publish Year Pages File Format Full-Text
45454 46412 2015 10 PDF Available
Title
High catalytic activity of magnetic FeOx/NiOy/SBA-15: The role of Ni in the bimetallic oxides at the nanometer level
Abstract

•Highly catalytic active and magnetic FeOx/NiOy/SBA-15 was fabricated.•Incorporation of Fe onto the NiOy surface induced the formation of new nano-FeNi.•The roles of Ni in the bimetallic oxides at the nanometer level were investigated.•The catalyst showed good recyclability and reusability.•Synergistic effects in the catalyst are responsive for these excellent performances.

Recently, great efforts have been devoted for improving the catalytic activity of the iron-based bimetallic oxide catalysts by taking advantage of the synergistic effects between Fe and the second metal. Herein, we report the preparation of a highly active and magnetic nickel–iron Fenton-like catalyst by fabricating uniform and highly dispersed mixed phase FeOx/NiOy in mesoporous material SBA-15 (Santa Barbara Amorphous-15). This bimetallic oxide catalyst achieved 99.3% removal of the dye Acid Red 73 in 1 h, while monometallic loaded catalysts reached 29.2% and 21.9% only. Besides, 65.81% TOC removal of Acid Red 73 (initial concentration of H2O2 was 4.0 mM) and more than 95% utilization efficiency of H2O2 were obtained by FeOx/NiOy/SBA-15 in 1 h, which were much higher than the traditional Fe2+ catalyst (only 49.81% and 28.56%, respectively). At last, this catalyst showed good reusability and can be easily separated by using a magnet. Characterization results confirmed that iron species including Fe3O4 and Fe2O3, nickel species including Ni(0) and NiO coexisted in the synthesized FeOx/NiOy/SBA-15. The test results and mechanism analysis showed that nickel species have positive contributions to the high catalytic activity of this catalyst.

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Keywords
Bimetallic catalyst; Fenton-like; Nanoparticles; Magnetic; Synergistic effect
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High catalytic activity of magnetic FeOx/NiOy/SBA-15: The role of Ni in the bimetallic oxides at the nanometer level
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 179, December 2015, Pages 239–248
Authors
, , , , ,
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