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Photocatalytic properties of nanosized Bi2WO6 catalysts synthesized via a hydrothermal process

Paper ID Volume ID Publish Year Pages File Format Full-Text
49151 46557 2006 11 PDF Available
Title
Photocatalytic properties of nanosized Bi2WO6 catalysts synthesized via a hydrothermal process
Abstract

Nanosized Bi2WO6 was synthesized by a hydrothermal crystallization process. The as-prepared samples were characterized by X-ray diffraction, Brunauer–Emmet–Teller surface area and porosity measurements, transmission electron microscopy, Raman spectra, and diffuse reflectance spectroscopy. The photoactivities of the as-prepared samples for the rhodamine-B photodegradation were investigated systematically. As a result, the sample prepared at 180 °C exhibited the highest photochemical activity under visible-light irradiation. The further experiments revealed that the catalyst was active in a wide spectral range. Density functional theory calculations suggested that the visible-light response was due to the transition from the valence band formed by the hybrid orbitals of Bi 6s and O 2p to the conduction band of W 5d. The photoactivity of the catalyst in relationship with the hydrothermal temperature, the crystal and band structure were also discussed in detail.

Keywords
Photocatalytic; Nanosized Bi2WO6; Hydrothermal synthesis; Rhodamine-B; Visible-light
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Photocatalytic properties of nanosized Bi2WO6 catalysts synthesized via a hydrothermal process
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 66, Issues 1–2, 20 June 2006, Pages 100–110
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
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