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Preparation of (Ga1−xZnx) (N1−xOx) solid-solution from ZnGa2O4 and ZnO as a photo-catalyst for overall water splitting under visible light

Paper ID Volume ID Publish Year Pages File Format Full-Text
44239 46010 2007 8 PDF Available
Title
Preparation of (Ga1−xZnx) (N1−xOx) solid-solution from ZnGa2O4 and ZnO as a photo-catalyst for overall water splitting under visible light
Abstract

A solid-solution of GaN and ZnO (Ga1−xZnx) (N1−xOx), as a visible-light-driven photo-catalyst for overall water splitting, is successfully prepared using both ZnGa2O4 and a ZnGa2O4–ZnO mixture. The photo-catalytic activity of the catalyst is found to be dependent on both the Zn/Ga ratio of the starting material and the nitridation time, because both factors affect the crystallinity and atomic composition of the final (Ga1−xZnx) (N1−xOx) material. It is also revealed that the addition of ZnO promotes crystallization of the catalyst and controls the zinc concentration, thereby improving activity. By adjusting these two preparation parameters, it is possible to obtain a material with optimal crystallinity and atomic composition for overall water splitting under visible light (λ > 400 nm).

Graphical abstractA solid-solution of GaN and ZnO (Ga1−xZnx) (N1−xOx), is successfully prepared by nitriding ZnGa2O4 powder at 1123 K for 15 h under a flow of NH3, and the addition of an appropriate amount of ZnO to the starting material is shown to improve the photo-catalytic activity of the final product substantially.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Heterogeneous photo-catalysis; Hydrogen production; Oxynitride; ZnGa2O4
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Preparation of (Ga1−xZnx) (N1−xOx) solid-solution from ZnGa2O4 and ZnO as a photo-catalyst for overall water splitting under visible light
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 327, Issue 1, 31 July 2007, Pages 114–121
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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