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A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation

Paper ID Volume ID Publish Year Pages File Format Full-Text
45146 46401 2016 9 PDF Available
Title
A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation
Abstract

•New all oxynitride-based solid state Z-scheme photocatalytic systems were constructed for the first time.•Nb3.49N4.56O0.44/(GaxZn1-x)(NxO1-x)(6.0) exhibits the highest rate for complete Cr(VI) reduction and extremely high efficiency for water oxidation.•A similar solid state Z-scheme photocatalytic system was also obtained when compositing Nb3.49N4.56O0.44 with TaON.

Achieving ideal photocatalytic systems by mimicking Z-scheme mechanism in natural photosynthesis results in highly efficient artificial photosynthesis. A new oxynitride-based solid state Z-scheme photocatalytic system containing (GaxZn1-x)(NxO1-x) and Nb3.49N4.56O0.44 was constructed. Nb3.49N4.56O0.44/(GaxZn1-x)(NxO1-x)(6.0) exhibits the highest rate for complete reduction of Cr(VI) within 30 min under simulated sunlight irradiation as well as extremely high apparent quantum efficiency of 68% at 350 nm 24.4% at 420 nm for photocatalytic water oxidation. A similar solid state Z-scheme photocatalytic system was also obtained when compositing Nb3.49N4.56O0.44 with TaON. It’s expected that Nb3.49N4.56O0.44 can also be composed with other oxynitride semiconductor to construct more oxynitride-based solid state Z-scheme photocatalytic systems.

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Keywords
Oxynitride semiconductors; Photocatalysis; Solid-state; Z-scheme; Energy conversion
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A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 183, April 2016, Pages 176–184
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
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Full-text PDF Download
Online Support
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