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Enhancement of photocatalytic activity for WO3 by simple NaOH loading

Paper ID Volume ID Publish Year Pages File Format Full-Text
39506 45825 2014 6 PDF Available
Title
Enhancement of photocatalytic activity for WO3 by simple NaOH loading
Abstract

•High photocatalytic activity of NaOH-loaded WO3.•Enhancement of photocatalytic activity of the WO3 by over 5 wt% of NaOH loading.•Proposal of new reasons for enhancement of photocatalytic activity.•Stability of NaOH-loaded WO3.

We found a simple method for preparation of NaOH-loaded WO3 with high photocatalytic activity under visible light irradiation. The sample was characterized with XRD, UV–Vis, VB-XPS, and other methods. From the VB-XPS data, the potentials of bottom of conduction band (CB) and top of valence band (VB) for WO3 were found to be lifted up by NaOH loading. Furthermore, this NaOH-loaded WO3 exhibited marked photocatalytic activity for 2-propanol decomposition into CO2 under visible light irradiation. The activity of 5 wt% of NaOH-loaded WO3 was 120 times higher than that of pure WO3. Possible reasons for the higher activity of the NaOH-loaded WO3 are the raising of the potential of CB and suppression of H2O2 accumulation. More detailed analyses were conducted using the reaction mechanism and potentials of VB and CB. This stable solid-base-loaded WO3 maintains its photocatalytic activity for over 3 months.

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Keywords
Solid base; Band structure; H2O2; Bottom of conduction band; Electron consumption.
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Enhancement of photocatalytic activity for WO3 by simple NaOH loading
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 488, November 2014, Pages 183–188
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