Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5465050 | Surface and Coatings Technology | 2017 | 6 Pages |
Abstract
Effects of nitridation condition on gallium-zinc oxynitride solid solution (GaN:ZnO) was investigated to optimize the composition of GaN:ZnO for dye-modified photocatalysts. Gallium nitride (GaN) formed from Ga2O3 at 973Â K, and GaN:ZnO was obtained over 1073Â K under NH3 gas flow. Nitrogen content in GaN:ZnO increased with increasing nitridation temperature and time, while zinc content decreased because of evaporation. Although UV-vis absorption spectra of GaN:ZnO powders were not significantly changed in different compositions, the water splitting activities of the dye-modified GaN:ZnO photocatalysts depended on the composition of GaN:ZnO. The highest formation rates of H2 and O2 were achieved by the GaN:ZnO containing 15% of zinc and 73% of nitrogen. Finally, the nitridation condition was optimized at 1123Â K 15Â h under NH3 gas flow (200Â ml/min) for preparation of the dye-modified GaN:ZnO powder as water splitting photocatalyst.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Hidehisa Hagiwara, Ryota Kakigi, Shuhei Takechi, Motonori Watanabe, Satoshi Hinokuma, Shintaro Ida, Tatsumi Ishihara,