Red-Light-Driven Water Splitting by Au(Core)–CdS(Shell) Half-Cut Nanoegg with Heteroepitaxial Junction
| Autor: | Hiroaki Tada, Shin-ichi Naya, Musashi Fujishima, Takahiro Kume, Ryo Akashi |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Chemistry
Analytical chemistry Nanoparticle Quantum yield 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Epitaxy 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Artificial photosynthesis Colloid and Surface Chemistry Photocatalysis Water splitting 0210 nano-technology Dissolution Stoichiometry |
| Zdroj: | Journal of the American Chemical Society. 140:1251-1254 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | A key material for artificial photosynthesis including water splitting is heteronanostructured (HNS) photocatalysts. The photocatalytic activity depends on the geometry and dimension, and the quality of junctions between the components. Here we present a half-cut Au(core)–CdS(shell) (HC-Au@CdS) nanoegg as a new HNS plasmonic photocatalyst for water splitting. UV-light irradiation of Au nanoparticle (NP)-loaded ZnO (Au/ZnO) at 50 °C induces the selective deposition of hexagonal CdS on the Au surface of Au/ZnO with an epitaxial (EPI) relation of CdS{0001}/Au{111}. The subsequent selective dissolution of the ZnO support at room temperature yields HC-Au@CdS with the Au NP size and EPI junction (#) retained. Red-light irradiation (λex = 640 nm) of HC-Au@#CdS gives rise to continuous stoichiometric water splitting with an unprecedentedly high external quantum yield of 0.24%. |
| Databáze: | OpenAIRE |
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