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Highly active and stable CdS–TiO2 visible photocatalyst prepared by in situ sulfurization under supercritical conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
47046 46457 2011 7 PDF Available
Title
Highly active and stable CdS–TiO2 visible photocatalyst prepared by in situ sulfurization under supercritical conditions
Abstract

A novel porous CdS–TiO2 photocatalyst with large surface area and high crystallization degree was synthesized by in situ sulfurization of doped TiO2 under supercritical conditions. The CdS acted as a photosensitizing agent to activate TiO2 in visible light area, while the TiO2 acted as an electron acceptor to separate the photo-induced electrons from holes in the CdS. Under visible light irradiation, the as-prepared CdS–TiO2 exhibited high activity in photocatalytic degradation of 4-chlorophenol (4-CP) owing to the high surface area, the well dispersed CdS nanocrystals, and especially the strong interaction between CdS and TiO2 which greatly enhanced the photosensitizing effect of CdS and also effectively inhibited the recombination between photo-induced electrons and holes. Meanwhile, the CdS–TiO2 also displayed strong durability since the strong interaction between CdS and TiO2 could efficiently protect the CdS from photo-corrosion and leaching off.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► CdS–TiO2 photocatalyst is prepared by in situ sulfurization under supercritical conditions. ► CdS–TiO2 displays strong interaction between CdS and TiO2. ► High visible photoactivity is due to enhanced photosensitizing effect of CdS and inhibition of photoelectron-hole recombination. ► CdS–TiO2 exhibits long lifetime owing to the inhibition of photo-corrosion and leaching of CdS.

Keywords
Supercritical treatment; CdS–TiO2 visible-light photocatalyst; Photosensitization; CdS–TiO2 interaction; Degradation of 4-chlorphenol
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Highly active and stable CdS–TiO2 visible photocatalyst prepared by in situ sulfurization under supercritical conditions
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 106, Issues 1–2, 21 July 2011, Pages 69–75
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