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CdS-sensitized K2La2Ti3O10 composite: A new photocatalyst for hydrogen evolution under visible light irradiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
54859 47029 2013 6 PDF Available
Title
CdS-sensitized K2La2Ti3O10 composite: A new photocatalyst for hydrogen evolution under visible light irradiation
Abstract

A series of cadmium sulfide (CdS)-sensitized layered perovskite-type compound (K2La2Ti3O10) composites (hereafter designated as CdS/K2La2Ti3O10) photocatalysts were synthesized by loading CdS particles on K2La2Ti3O10 via a facile precipitation method. The photocatalysts were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and ultraviolet–visible (UV–vis) diffuse reflection spectra. The photocatalytic activities of these catalysts for H2 production were investigated in the presence of a Na2S sacrificial reagent under visible light irradiation. The results revealed that the CdS/K2La2Ti3O10 samples displayed a strong light absorption in the visible region, and the UV–vis diffuse reflectance spectra changed with the proportion of CdS present. The composite photocatalysts exhibited enhanced photocatalytic hydrogen evolution, and the highest activity of 50.53 μmol was achieved using 5 wt.% CdS/K2La2Ti3O10. This enhanced photocatalytic activity can be attributed to the efficient separation of electron–hole pairs and prevention of their recombination under the joint effects of the electric field established at the heterojunction and the layered space of K2La2Ti3O10.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (171 K)Download as PowerPoint slideHighlights► CdS was deposited on the surface of K2La2Ti3O10 via a precipitation method. ► the deposition of CdS greatly increased the visible light absorption for K2La2Ti3O10. ► The composite photocatalysts exhibited significant enhancement in photocatalytic hydrogen evolution.

Keywords
K2La2Ti3O10; CdS; Surface deposition; Hydrogen evolution; Photocatalysis; Visible light
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CdS-sensitized K2La2Ti3O10 composite: A new photocatalyst for hydrogen evolution under visible light irradiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 207, 30 May 2013, Pages 44–49
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