PHOTOCATALYTIC WATER SPLITTING USING THE SEMICONDUCTOR HETEROJUNCTION BETWEEN MoO3-X/CDS
| Autor: | Felipe L. N. Sousa, Luana B. C. Oliveira, Lizeth Carolina Mojica, Leonardo J. L. Maciel, Denilson V. Freitas, Marco A. S. Garcia, Walter M. Azevedo, Giovanna Machado |
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| Jazyk: | English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Química Nova, Vol 47, Iss 9 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1678-7064 0100-4042 |
| DOI: | 10.21577/0100-4042.20240056 |
| Popis: | It is essential to diversity energy sources for ensuring sustainability. While hydrogen is considered a promising energy storage medium, its potential hinges on the development of efficient photocatalysts for green production. In addressing this challenge, we evaluated the performance of a heterojunction system composed of non-stoichiometric molybdenum oxides (MoO3−x) and cadmium sulfide (CdS) quantum dots (QDs) for water splitting. MoO3−x were synthesized via gamma irradiation of the MoO3 in the presence of formic acid (FA), while CdS-MPA QDs were electrosynthesized. The heterojunction was formed through adsorption. The structural and electronic characterization revealed a progressive transformation from MoO3 to MoO3−x and MoO3−x/CdS-MPA QDs, demonstrating enhanced water-splitting performance. Upon evaluation, the study revealed a charge transfer mechanism, highlighting the significance of relative band positions between MoO3−x and CdS-MPA QDs in promoting eco-friendly hydrogen evolution and methanol processing. Thus, we suggest that the synergism between MoO3−x and CdS-MPA QDs semiconductors makes the heterojunction system a promising solution for photocatalytic production of hydrogen and oxygen. |
| Databáze: | Directory of Open Access Journals |
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