期刊
APPLIED SURFACE SCIENCE
卷 456, 期 -, 页码 645-656出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2018.06.183
关键词
Self-assembly; Perylenetetracarboxylic acid diimide; Nanosheet; Hybrid; Photocatalytic performance
类别
资金
- National Natural Science Foundation of China [51672081]
- Key Program of Natural Science of Hebei Province [B2016209375]
- Hebei Natural Science Funds for the Joint Research of Iron and Steel [B2016209348]
- support program for one hundred excellent talents of innovation in Hebei provincial universities (III) [SLRC2017049]
This paper reports that hybrid titanium dioxide (TiO2) packaged self-assembly perylenetetracarboxylic acid diimide (PTCDI) by self-assembly. These were synthesized through simple mechanical milling that has great photocatalytic performance under visible light. The PTCDI@TiO2 composite had high activity for the degradation of phenol and 2,4-dichlorophenol, which were 2.3 and 3.2 times of the monomer PTCDI, respectively. After three cycles, the activity of the composite catalyst remained at 70%. Further analysis showed that the photocatalytic activity and stability are mainly due to the enhancement of the charge mobility by the pi-pi conjugated structure in PTCDI. Moreover, the good energy level matching between PTCDI and TiO2 helps to separate the electron-hole, thus improving the photocatalytic performance of the composite. The origin of photocatalytic activity was greatly improved due to holes and O-center dot(2)-, which was mainly attributed to the strong interaction between PTCDI and TiO2.
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