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Facile synthesis of CeO2 hollow structures with controllable morphology by template-engaged etching of Cu2O and their visible light photocatalytic performance

Paper ID Volume ID Publish Year Pages File Format Full-Text
45476 46412 2015 10 PDF Available
Title
Facile synthesis of CeO2 hollow structures with controllable morphology by template-engaged etching of Cu2O and their visible light photocatalytic performance
Abstract

•The cubic, polyhedral and sphere CeO2 hollow structures were synthesized by a template-engaged method.•The formation mechanism was reasonably explained by HSAB principle.•The polyhedral CeO2 nanocages show significantly enhanced catalytic activities.•The photocatalytic mechanism of CeO2 hollow structures was investigated.

The novel ceria (CeO2) hollow structures with uniform cubic, polyhedral and sphere shapes were successfully synthesized by template-engaged coordinating etching of shape-controlled Cu2O crystals. The obtained samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microcopy (TEM), high resolution of transmission electron microcopy (HRTEM), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR) and photoluminescence spectroscopy (PL). The photocatalytic oxygen evolution via water oxidation was investigated for CeO2 hollow structures with varied shapes under visible light irradiation. The photocatalytic results indicate that polyhedral CeO2 nanocages show the highest photocatalytic activity, in contrast with spherical CeO2 hollow structure and cubic CeO2 hollow structure. The excellent catalytic activity can be attributed to the unique properties of the polyhedral CeO2 nanocages, including efficient light refection through the inner shells, more active sites for enhancing separation efficiency of charge carriers. It is expected that this study could provide helpful results for designing and exploration of novel hollow structures with tunable photocatalytic performance.

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Keywords
CeO2 hollow structure; Template-engaged; Morphology-controlled; Photocatalysis
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Facile synthesis of CeO2 hollow structures with controllable morphology by template-engaged etching of Cu2O and their visible light photocatalytic performance
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 179, December 2015, Pages 458–467
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