期刊
RSC ADVANCES
卷 7, 期 83, 页码 52626-52631出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra08969d
关键词
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资金
- National Nature Science Foundation of China [21407049, 21377038, 21237003, 21677048]
- Science and Technology Commission of Shanghai Municipality [16JC1401400, 17520711500]
- National Key Research and Development Program [2016YFA0204200]
- China Postdoctoral Science Foundation [2015T8049]
- Fundamental Research Funds for the Central Universities [222201714061]
In this work, graphene carbon nitride (g-C3N4, CN) is loaded into the carbon dots (CD) modified SBA-15 mesoporous silica by a precursor impregnation method. The obtained samples are characterized by various spectroscopy techniques and applied in the visible-light-driven photocatalytic degradation of phenol. The photocatalytic activity of the obtained SBA15-CN is 2 times as high as that of pure g-C3N4 due to the high dispersion of g-C3N4 into SBA-15 channels. For CD-SBA15-CN, the visible light driven photocatalytic activity is further increased, which is 4 times as high as that of pure g-C3N4. This promotion can be attributed to carbon dots with the ability to transfer photogenerated electrons as well as the compound catalyst having a bigger surface area and pore volume. When the weight ratio of CD-SBA15/g-C3N4 was 1 : 6, the catalyst (1 : 6 CD-SBA15-CN) performed best. The 1 : 6 CD-SBA15-CN photocatalyst had enhanced visible absorption and the interaction between CDs and g-C3N4 can further promote the separation of photo-generated electrons and holes, achieving the highest photocatalytic activity of CD-SBA15-CN compared to SBA15-CN and g-C3N4 .
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