| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 583213 | Journal of Hazardous Materials | 2008 | 6 Pages |
Abstract
Photocatalytic removal of phenol, rhodamine B, and methyl orange was studied using the photocatalyst ZnO/poly-(fluorene-co-thiophene) (PFT) under visible light. After 2Â h irradiation with three 1Â W LED (light-emitting diode) lights, about 40% removal of both phenol and methyl orange was achieved; rhodamine B was completely degraded to rhodamine. Diffuse reflectance spectra showed that the absorbance range of PFT/ZnO was expanded from 387Â nm (ZnO) to about 500Â nm. Photoluminescent spectra and photoluminescent quantum efficiency indicated that electrons were transferred from PFT to the conduction band of ZnO. Electron spin resonance (ESR) signals of spin-trapped paramagnetic species with 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) evidenced that the OH radicals were indeed formed in the PFT/ZnO system under visible light irradiation. A working mechanism involving excitation of PFT, followed by charge injection into the ZnO conduction band is proposed.
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Authors
Rongliang Qiu, Dongdong Zhang, Yueqi Mo, Lin Song, Eric Brewer, Xiongfei Huang, Ya Xiong,