期刊
RSC ADVANCES
卷 8, 期 73, 页码 42109-42115出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ra07583b
关键词
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资金
- National Key Basic Research Program of China [2014CB931801, 2016YFA0200700]
- National Natural Science Foundation of China [51772957, 21721002, 21475029]
- Frontier Science Key Project of Chinese Academy of Sciences [QYZDJ-SSW-SLH038]
- Strategic Priority Research Program of Chinese Academy of Sciences [XDA09040100]
- K. C. Wong Education Foundation
- Youth Innovation Promotion Association CAS
- CAS-TWAS president's fellowship
BCN (boron carbon nitride) nanosheets are promising photocatalyst materials for solar fuel production by visible light-driven water splitting and CO2 reduction due to their tunable band gap and unique properties. C-doping into h-BN by thermal annealing makes possible the preparation of BCN nanosheets with photocatalytic activity under visible light irradiation, but it generally requires a very high temperature (>1250 degrees C) from the thermodynamic viewpoint. Here, we report a new method to prepare BCN nanosheets with visible light-photocatalytic activity at lower annealing temperature (1000 degrees C) than equilibrium by adding alkaline earth metal compounds. BCN nanosheets formed in borate melt show a clear layered structure, tunable bandgap and photocatalytic activity for water splitting and CO2 reduction under visible light illumination. This provides a direction for doping other elements into h-BN at low annealing temperature by alkaline earth metal borates.
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