Back to Search
Start Over
Phosphatized GaZnInON nanocrystals with core-shell structures for efficient and stable pure water splitting via four-electron photocatalysis.
- Source :
-
Chemical Engineering Journal . Apr2021, Vol. 410, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- The successful phosphorization of gallium indium zinc oxynitride consists of GaInZnON core and InP shell with an ideal type-II band alignment. With efficient charge separation during photocatalytic pure water splitting, the AQE can be up to 10.6% at 430 nm and 13.8% at 350 nm, respectively. • A core-shell GaInZnON@InP heterojunction photocatalyst is prepared. • The heterojunction displays an ideal type-Ⅱ band alignment. • The band alignment enables efficient charge separation. • Photocatalytic overall water splitting with an AQY of 10.6% is achieved. Overall water splitting via solar-driven photocatalysis provides an ideal way to realizing a viable and sustainable hydrogen economy, while the development of efficient photocatalysts remains a grand challenge to date. Herein, we report the successful surface phosphorization of a gallium indium zinc oxynitride (GaInZnON) photocatalyst, which comprises a GaInZnON core and a thin InP shell. The success to the synthesis relies on the rapid diffusion of In from the bulk to the crystal surface and preferential combination of In with P to form an outer layer. The enhanced charge migration was confirmed with characterization and the charge redistribution difference around the heterojunction. The core-shell composite having an ideal type-II band alignment enables efficient charge separation within the particle scale and significantly improved photocatalytic activity toward pure water splitting for simultaneous and stoichiometric H 2 and O 2 evolution. The apparent quantum efficiencies can be up to 10.6% at 430 nm and 13.8% at 350 nm, respectively. Our results suggest that such core-shell GaInZnON@InP architectures hold great potential for efficient and scalable solar hydrogen generation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13858947
- Volume :
- 410
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Journal
- Publication Type :
- Academic Journal
- Accession number :
- 148656355
- Full Text :
- https://doi.org/10.1016/j.cej.2020.128391