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Highly efficient photocatalytic oxidation of phenol over ordered mesoporous Bi2WO6

Paper ID Volume ID Publish Year Pages File Format Full-Text
46934 46453 2011 6 PDF Available
Title
Highly efficient photocatalytic oxidation of phenol over ordered mesoporous Bi2WO6
Abstract

Ordered mesoporous Bi2WO6 (M-Bi2WO6) with nanocrystalline walls was fabricated for the first time by a silica-templated nanocasting method with bismuth nitrate and phosphotungstic acid as precursors. The as-prepared mesoporous Bi2WO6 sample exhibited a much higher photocatalytic activity than the conventional hydrothermally synthesized nanoscale Bi2WO6 (HR-Bi2WO6) on the degradation of phenol which is quite toxic but widely used and slowly degradable in the environment. Almost 97% of the phenol molecules were degraded within 60 min along with the sharp decrease of total organic carbon (TOC) in 100 mL of phenol solution (20 mg/L) under visible-light irradiation. Compared with HR-Bi2WO6 sample, the M-Bi2WO6 sample exhibited a negative shift of conduction band edge potential and faster charge transfer property which helped to improve the photocatalytic performance.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights• Ordered mesoporous Bi2WO6 is firstly realized by nanocasting method. • It is used for photocatalytic oxidation of organic contaminants. • Its photocatalytic activity is significantly better than nonporous powder. • Electrochemical studies reveal the reasons for its high photocatalytic activity.

Keywords
Phenol oxidation; Mesoporous Bi2WO6; Photocatalysis; Electrochemical study
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Highly efficient photocatalytic oxidation of phenol over ordered mesoporous Bi2WO6
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 106, Issues 3–4, 11 August 2011, Pages 559–564
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