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Synthesis, characterization and visible-light photocatalytic properties of Bi2WO6 and Bi2W2O9 obtained by co-precipitation method

Paper ID Volume ID Publish Year Pages File Format Full-Text
42006 45907 2010 6 PDF Available
Title
Synthesis, characterization and visible-light photocatalytic properties of Bi2WO6 and Bi2W2O9 obtained by co-precipitation method
Abstract

The bismuth tungstates Bi2WO6 and Bi2W2O9 were prepared by co-precipitation method at different calcination temperatures. The oxides were characterized by different techniques such as simultaneous thermogravimetric and differential thermal analysis (TGA/DTA), X-ray powder diffraction (XRD), diffuse reflectance spectroscopy (DRS), nitrogen physisorption, and scanning electron microscopy (SEM). The photocatalytic activity of such bismuth tungstates was evaluated by degradation of rhodamine B under visible light irradiation. The degradation of the dye followed a first-order reaction with k′ = 5.6 × 10−3 min−1 and t1/2 = 124 min for the best sample, which was Bi2W2O9 prepared at 700 °C.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (119 K)Download as PowerPoint slideResearch highlights▶ The bismuth tungstates Bi2WO6 and Bi2W2O9 were prepared by co-precipitation method. ▶ The presence of NH4NO3 in the precursors plays an important role in the final properties of the bismuth tungstates. ▶ The samples prepared by co-precipitation showed a better degradation of the rhodamine B dye than the samples of solid-state reaction. ▶ Two possible mechanisms of degradation of the dye are explained according other reports.

Keywords
Bi2WO6; Bi2W2O9; Bismuth tungstates; Photocatalysis
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Synthesis, characterization and visible-light photocatalytic properties of Bi2WO6 and Bi2W2O9 obtained by co-precipitation method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 383, Issues 1–2, 31 July 2010, Pages 128–133
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