芴与噻吩共聚物敏化二氧化钛在可见光下的光催化活性

Photocatalytic Activities of TiO2 Modified by Poly(fluorene-cothiophene) under Visible Light

紫外漫反射光谱表明,芴与噻吩共聚物PFT敏化二氧化钛在360～500 nm之间都有强吸收,其最大吸收边由387 nm（TiO2）红移至500 nm.荧光发射光谱显示,PFT吸附于TiO2表面时,其受激发后将电子注入TiO2导带.敏化后的TiO2在可见光下能有效将苯酚降解去除.

The diffuse reflectance spectra showed that the absorb range of TiO2/PFT was expanded from 387 nm （TiO2 ）to about 500 nm, and the fluorescent emission spectra showed that the spectral shape of TiO2/PFT was identical with pure PFT although the intensity of TiO2/PFT decreased, which indicated the electron injecting from PFT to the conduction band of TiO2. The PFT can photosensitize TiO2 to decompose effectively phenol under visible light.