Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 10, Pages 2684-2688Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201612551
Keywords
cadmium sulfide; cobalt sulfide; hydrogen evolution; multiple reflections; Z-scheme
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Funding
- National Nature Science Foundation of China [21577036, 21377038, 21237003, 21677048]
- State Key Research Development Program of China [2016YFA0204200, 2013CB632403]
- Chenguang Program - Shanghai Education Development Foundation
- Shanghai Municipal Education Commission [14CG30, 16JC1401400]
- Fundamental Research Funds for the Central Universities [22A201514021]
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Hollow structures with an efficient light harvesting and tunable interior component offer great advantages for constructing a Z-scheme system. Controlled design of hollow cobalt sulfide (Co9S8) cubes embedded with cadmium sulfide quantum dots (QDs) is described, using hollow Co(OH) 2 as the template and a one-pot hydrothermal strategy. The hollow CdS/Co9S8 cubes utilize multiple reflections of light in the cubic structure to achieve enhanced photocatalytic activity. Importantly, the photoexcited charge carriers can be effectively separated by the construction of a redox-mediator-free Z-scheme system. The hydrogen evolution rate over hollow CdS/Co9S8 is 134 and 9.1 times higher than that of pure hollow Co9S8 and CdS QDs under simulated solar light irradiation, respectively. Moreover, this is the first report describing construction of a hollow Co9S8 based Z-scheme system for photocatalytic water splitting, which gives full play to the advantages of light-harvesting and charges separation.
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