Cu2ZnSnS4–Au Heterostructures: Toward Greener Chalcogenide-Based Photocatalysts
| Autor: | Javier Vela, Michelle J. Thompson, Patrick Steven Dilsaver, Brittany L. Hallmark, Malinda D. Reichert |
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| Rok vydání: | 2014 |
| Předmět: |
Fabrication
Materials science Chalcogenide business.industry Nanoparticle Heterojunction Nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials Catalysis chemistry.chemical_compound General Energy Semiconductor chemistry Nanorod CZTS Physical and Theoretical Chemistry business |
| Zdroj: | The Journal of Physical Chemistry C. 118:21226-21234 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/jp5062336 |
| Popis: | Chalcogenide-based semiconductor–metal heterostructures are interesting catalysts for solar-to-chemical energy conversion, but current compositions are impractical due to the relative toxicity and/or scarcity of their constituent elements. To address these concerns, Cu2ZnSnS4 (CZTS) emerged as an interesting alternative to other chalcogenide-based semiconductors; however, the fabrication of CZTS-metal heterostructures remains unexplored. In this paper, we systematically explore four methods of synthesizing CZTS-Au heterostructures, specifically: reaction of CZTS nanorods with either a soluble molecular gold precursor (AuCl3) or preformed gold (Au) nanoparticles, each under thermal (heating in the dark) or photochemical reaction conditions (350 nm lamp illumination at room temperature). We find that using AuCl3 under thermal deposition conditions results in the most well-defined CZTS-Au heterostructures, containing >99% surface-bound 2.1 ± 0.5 nm Au islands along the whole length of the nanorod. These CZTS... |
| Databáze: | OpenAIRE |
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