Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 6, Pages 4321-4328Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am500007u
Keywords
sulfur doping; photocatalyst; polyimide; degradation; visible light
Funding
- NSFC [21273111, 21273106, 51272101]
- National Basic Research Program of China (973 Program) [2013CB632404]
- Jiangsu Provincial Natural Science Foundation [BK20130053]
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Sulfur-doped polyimide (SPI) photocatalysts were synthesized for the first time via an in situ thermal copolymerization method using sublimed sulfur (S-4) as a dopant. Sulfur doping not only extended the absorption range of polyimide (PI) for visible light but also enhanced the oxidation ability of the photoinduced hole. The doped sulfur substitutes for the lattice nitrogen in triazine rings of PI to form the S C bond and changes the distribution of negative charge in the two-dimensional plane of PI. The enhanced photocatalytic activity of SPI in the degradation of methyl orange is ascribed to the strong oxidation ability of the photoinduced hole of SPI and an effective suppression to the recombination of electrons and holes.
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