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Novel near room-temperature and/or light driven Fe-doped Sr2Bi2O5 photo/thermocatalyst for methylene blue degradation

Paper ID Volume ID Publish Year Pages File Format Full-Text
39291 45816 2015 9 PDF Available
Title
Novel near room-temperature and/or light driven Fe-doped Sr2Bi2O5 photo/thermocatalyst for methylene blue degradation
Abstract

•Fe-doped Sr2Bi2O5 can be excited by near room-temperature and/or Xe light.•The thermocatalytic and photo/thermocatalytic activities were investigated.•It showed well thermocatalytic and photo/thermocatalytic activities for removing MB.•The degradation mechanism was established in detail.

A novel photo/thermocatalyst was synthesized using co-precipitation. The catalyst above was used to degrade the dye methylene blue (MB), via the processes of thermocatalytic degradation (TCD) and photo/thermocatalytic degradation (PTCD). The catalysts were characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), UV–Vis diffusion reflectance spectroscopy (DRS), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), the Brunauer–Emmett–Teller (BET) technique, and the terephthalic acid photo-luminescence probing technique (TA-PL). Fe-doped Sr2Bi2O5 powder was found to exhibit a high thermocatalytic activity and a high photo/thermocatalytic activity for the degradation of MB. The TCD and PTCD MB removal efficiencies reached 92.6 and 98.8%, respectively. Furthermore, HO and O2− were not found to be the predominant active radicals. Holes were found to be generated in both two TCD and PTCD; however, TA-PL and radical scavenger experiments indicated that more holes were formed in PTCD. This study discussed the probable thermocatalytic and photo/thermocatalytic mechanisms, finding them to be in good agreement with results.

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Keywords
Near room-temperature; Fe-doped Sr2Bi2O5; Photo/thermocatalyst; Degradation; Methylene blue
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Novel near room-temperature and/or light driven Fe-doped Sr2Bi2O5 photo/thermocatalyst for methylene blue degradation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 497, May 2015, Pages 216–224
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