Hezam, A. and Namratha, K. and Drmosh, Q. A. and Ponnamma, D. and Nagi Saeed, A. M. and Ganesh, V. and Neppolian, B. and Byrappa, K. (2018) Direct Z-scheme Cs2O-Bi2O3-ZnO heterostructures for photocatalytic overall water splitting. Journal of Materials Chemistry A, 6 (43). pp. 21379-21388.
Full text not available from this repository. (Request a copy)Abstract
In this work, a direct Z-scheme Cs2O-Bi2O3-ZnO heterostructure without any electron mediator is fabricated by a simple solution combustion route. Cs2O is chosen as a sensitizer to expand the light absorption range, and in addition, its conduction band minimum (CBM) and valence band maximum (VBM) positions are suitable to construct a direct Z-scheme system with ZnO and Bi2O3. Structural and elemental analyses show clear evidence for heterostructure formation. The Z-scheme charge carrier migration pathway in Cs2O-Bi2O3-ZnO is confirmed by high resolution XPS and ESR studies. The fabricated heterostructure exhibits a good ability to split water to H2 and O2 under simulated sunlight irradiation without any sacrificial agents or co-catalysts and has excellent photostability. The apparent quantum efficiency of the optimized Cs2O-Bi2O3-ZnO heterostructure reaches up to 0.92% at 420 nm. The excellent efficiency of this fabricated heterostructure is attributed to the efficient charge carrier separation, the high redox potential of the CBM and VBM benefiting from a direct Z-scheme charge carrier migration pathway and the extended light absorption range. © The Royal Society of Chemistry.
| Item Type: | Article |
|---|---|
| Subjects: | D Physical Science > Material Science |
| Divisions: | Department of > Material Science |
| Depositing User: | Manjula P Library Assistant |
| Date Deposited: | 11 Jan 2021 05:52 |
| Last Modified: | 11 Jan 2021 05:52 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/15363 |
Actions (login required)
 |
View Item |
