Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 12, Pages 5787-5798Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.01.094
Keywords
Photocatalytic hydrogen evolution; Core-shell-like heterojunction; Charge separation; Visible-light-driven; Efficient cocatalyst
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Funding
- Shandong Excellent Young Scientist Research Award Fund [BS2015CL002]
- Basic Research Project of Qingdao Source Innovation Program Fund [17-1-1-82-jch]
- Natural Science Foundation of Shandong Province [ZR2016BM08]
- Key Laboratory of Applied Surface and Colloid Chemistry (Shaanxi Normal University)
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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 ZnIn2-S-4@In(OH)(3) microspheres have been fabricated by a facile hydrothermal method via controlling the sulfur source. The marigold-like spherical ZnIn2S4 induced the in situ growth of cubic In(OH)(3) nanosheets as the outer shell, which efficiently transferred the photo-generated electrons and achieved efficient charge separation efficiency for highly photo catalytic H-2 production. Moreover, the intimate interfacial contact between ZnIn2S4 core and In(OH)(3) shell offered rectified charge transfer directions, which further boosted the charge separation. In consequence, the photocatalytic H-2 evolution under visible light irradiation was achieved on wide-gap In(OH)(3) owing to ZnIn2S4 as a cocatalyst, and a prominent photocatalytic H-2 production of 2088 mu mol g(-1) was obtained on core-shell-like ZnIn2S4@In(OH)(3) structure with an apparent quantum efficiency of 1.45% (400 nm), which was nearly 2-folds higher of H-2 production rate than the pristine ZnIn2S4. This work provides a prototype material for high efficiency of hydrogen evolution, and gives a new insight for the development of efficient heterojunction photocatalysts. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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