Release time:2023-10-19 Hits:
- Key Words:Indium compounds;Charge transfer - Efficiency - Heterojunctions - Hydrogen production - Light - Photocatalytic activity - Separation - Shells (structures) - Zinc compounds
- Abstract:Efficient separation of electrons and holes, associated with the reduction and oxidation, is of great importance in a photocatalytic reaction. 3D hierarchical core-shell-like ZnIn<inf>2</inf>S<inf>4</inf>@In(OH)<inf>3</inf> microspheres have been fabricated by a facile hydrothermal method via controlling the sulfur source. The marigold-like spherical ZnIn<inf>2</inf>S<inf>4</inf> induced the in situ growth of cubic In(OH)<inf>3</inf> nanosheets as the outer shell, which efficiently transferred the photogenerated electrons and achieved efficient charge separation efficiency for highly photocatalytic H<inf>2</inf> production. Moreover, the intimate interfacial contact between ZnIn<inf>2</inf>S<inf>4</inf> core and In(OH)<inf>3</inf> shell offered rectified charge transfer directions, which further boosted the charge separation. In consequence, the photocatalytic H<inf>2</inf> evolution under visible light irradiation was achieved on wide-gap In(OH)<inf>3</inf> owing to ZnIn<inf>2</inf>S<inf>4</inf> as a cocatalyst, and a prominent photocatalytic H<inf>2</inf> production of 2088 μmol g<sup>−1</sup> was obtained on core-shell-like ZnIn<inf>2</inf>S<inf>4</inf>@In(OH)<inf>3</inf> structure with an apparent quantum efficiency of 1.45% (400 nm), which was nearly 2-folds higher of H<inf>2</inf> production rate than the pristine ZnIn<inf>2</inf>S<inf>4</inf>. This work provides a prototype material for high efficiency of hydrogen evolution, and gives a new insight for the development of efficient heterojunction photocatalysts.<br/> © 2019 Hydrogen Energy Publications LLC
- Volume:44
- Issue:12
- Translation or Not:no
