期刊
ACS APPLIED MATERIALS & INTERFACES
卷 14, 期 17, 页码 19756-19765出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.2c03435
关键词
oxynitrides; mixed-anion compound; solid solution; low-temperature nitridation; solar fuels; water splitting; artificial photosynthesis
资金
- Japan Society for the Promotion of Science (JSPS) [JP16H06440, JP16H06441, JP17H06438]
- Tokuyama Science Foundation
- JSPS [JP120213208]
- JSPS Fellowship for Young Scientists [JP19J22433]
Wurtzite-structured Ga1-xZnx(N,O,F) was successfully synthesized by adding ZnF2 during nitridation, resulting in a redshift of the absorption edge and improved catalytic activity for water oxidation.
Wurtzite-structured Ga1-xZnx(N,O,F) was successfully synthesized by nitridation of mixtures of a Ga-containing oxide and ZnF2. The addition of ZnF2 lowered the nitridation temperature for the synthesis of Ga1-xZnx(N,O,F) to 823 K, even when bulk ZnGa2O4 was used as a paired precursor. This lowering of the synthesis temperature was ascribed to the enhancement of nitridation through the addition of fluorine. The low-temperature nitridation achieved by the addition of fluorine suppressed the volatilization of Zn compared with that during the synthesis of a GaN:ZnO solid solution by a conventional high-temperature ammonolysis reaction. The higher concentration of Zn, as well as the higher N concentration in Ga1-xZnx(N,O,F) achieved through the fluorine-assisted nitridation, led to a redshift of the absorption edge of Ga1-xZnx(N,O,F) to 560 nm compared with that of GaN:ZnO synthesized by the conventional ammonolysis reaction. The visible-light absorption of Ga1-xZnx(N,O,F) can be used to drive the photoelectrochemical oxidation of water.
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