title: Sulfur-doped polyimide photocatalyst with enhanced photocatalytic activity under visible light irradiation.
abstract: Sulfur-doped polyimide (SPI) photocatalysts were synthesized for the first time via an in situ thermal copolymerization method using sublimed sulfur (S4) 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.
authors.affiliation: Eco-materials and Renewable Energy Research Center (ERERC), National Laboratory of Solid State Microstructures, Kunshan Innovation Institute of Nanjing University , Nanjing 210093, China.
authors.forename: Cuicui
authors.initials: C
authors.lastname: Wang
authors.forename: Yong
authors.initials: Y
authors.lastname: Guo
authors.forename: Yu
authors.initials: Y
authors.lastname: Yang
authors.forename: Sheng
authors.initials: S
authors.lastname: Chu
authors.forename: Chenkun
authors.initials: C
authors.lastname: Zhou
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zou