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Hierarchical porous CdS nanosheet-assembled flowers with enhanced visible-light photocatalytic H2-production performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
46236 46435 2013 5 PDF Available
Title
Hierarchical porous CdS nanosheet-assembled flowers with enhanced visible-light photocatalytic H2-production performance
Abstract

•Hierarchical porous CdS nanosheet-assembled flowers were synthesized by a simple ion-exchange strategy using morphology-analogous Cd(OH)2 and Na2S as precursors.•The prepared CdS flowers exhibited high visible-light photocatalytic H2 production activity and 24.7% quantum efficiency at 420 nm.•The ion-exchange strategy of Cd(OH)2 intermediates can be extended to the preparation of other porous oxides and sulfides with hierarchical nanostructures.•The hierarchical organization of nanosheets and porous nanosheet structures can efficiently enhance light-absorption ability and provide a greater number of active adsorption sites.

Hierarchical porous CdS nanosheet-assembled flowers were synthesized by a simple ion-exchange strategy using morphology-analogous Cd(OH)2 and Na2S as precursors. The prepared CdS flowers exhibited high visible-light photocatalytic H2-production activity with a rate of 468.7 μmol h−1 and the corresponding apparent quantum efficiency (QE) of 24.7% at 420 nm, which exceeded that obtained on CdS nanoparticles by more than 3 times. This enhanced photocatalytic H2-production activity was achieved because the hierarchical organization of nanosheets and porous nanosheet structures can efficiently enhance light-absorption ability and provide a greater number of active adsorption sites. This work shows a great potential of hierarchical porous CdS nanosheet-assembled flowers for photocatalytic H2 production, and also demonstrates that the ion-exchange strategy of Cd(OH)2 intermediates can be extended to the preparation of other porous oxides and sulfides with hierarchical nanostructures.

Graphical abstractHierarchical porous CdS nanosheet-assembled flowers, synthesized by ion-exchange between Cd(OH)2 and Na2S, exhibited high visible-light photocatalytic H2 production performance.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Hierarchical; Porous CdS nanosheet; Ion-exchange strategy; Photocatalytic H2-production activity
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 138–139, 17 July 2013, Pages 299–303
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