期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 8, 期 5, 页码 1803-1810出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9tc05896f
关键词
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资金
- National Science Fund for Excellent Young Scholars of China [51522402]
- National Nature Science Foundation of China [51572019, U1460201]
- Fundamental Research Funds for the Central Universities [FRF-TP-15-006C1]
In this manuscript, a novel photocatalyst, CdS/BCN composites with CdS nanoparticles in situ grown on BCN nanosheets (CdS/BCN), was synthesized via a simple electrostatic interaction assisted supersaturated recrystallization method. Benefiting from a unique heterostructure, the CdS/BCN composites exhibited highly efficient and stable photocatalytic activity for degrading RhB and methylene blue under visible-light irradiation, and moreover, a high rate constant of 0.115 min(-1) has been obtained for degrading RhB, which was much higher than that of most CdS based photocatalysts (0.089 min(-1)). First-principles calculations revealed that the significantly enhanced photocatalytic activity of the CdS/BCN composite was mainly ascribed to the formed type-II heterojunction and the built-in electric field at the interface between CdS nanoparticles and BCN nanosheets, which promote the transfer of photo-generated electrons between CdS and BCN, and the ;O-2(-) radical originating from enriched photo-generated electrons was found to be the dominant species that was responsible for the enhanced photocatalytic performance in degrading organic molecules.
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