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Template-free synthesis of porous graphitic carbon nitride microspheres for enhanced photocatalytic hydrogen generation with high stability

Paper ID Volume ID Publish Year Pages File Format Full-Text
45581 46416 2015 8 PDF Available
Title
Template-free synthesis of porous graphitic carbon nitride microspheres for enhanced photocatalytic hydrogen generation with high stability
Abstract

•g-C3N4 microspheres were prepared via a solvothermal method for the first time.•Growth of g-C3N4 microspheres follows the Oswald ripening and self-assembly.•g-C3N4 microspheres display more effective visible light harvesting.•Hierarchical structure allows more efficient charge transport and separation.•g-C3N4 microspheres shows enhanced H2 generation with high stability.

Graphitic carbon nitride microsphere photocatalysts were prepared through a template-free solvothermal approach with post-heating treatment. Structural characterization results reveal that the as-prepared sample has the same composition as bulk g-C3N4, but appears as hierarchical microspheres with nanoporous surfaces. Comparing to the bulk g-C3N4, these porous microspheres exhibit narrowed bandgap and lower resistance, which allows more effective visible-light harvesting and more efficient transport and separation of photogenerated charge carriers. Consequently, we observed high rate of photocatalytic H2 production and stronger photocurrent responses under visible light irradiation. Further, the long-term photocatalytic test proved high stability of the prepared nanoporous microsphere for H2 generation.

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Keywords
Photocatalysis; Carbon nitride; Microspheres; Solvothermal method; Hydrogen production
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Template-free synthesis of porous graphitic carbon nitride microspheres for enhanced photocatalytic hydrogen generation with high stability
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 165, April 2015, Pages 503–510
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
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Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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