A new polystyrene-TiO2 nanocomposite film and its photocatalytic degradation

作者：Zan L^*; Tian LH; Liu ZS; Peng ZH

来源：Applied Catalysis A: General , 2004, 264(2): 237-242.

DOI：10.1016/j.apcata.2003.12.046

• TiO2
• polystyrene
• nanocomposite film
• solid-phase photocatalytic degradation

A new kind of photodegradable polystyrene (PS)-TiO2 nanocomposite film was synthesized. The TiO2 nanoparticles were first modified by grafting polymer on its surface (G-TiO2), and then the PS-G-TiO2 composite films were formed through polymerization. The photocatalytic degradation of the composite films was investigated. The as-prepared films were characterized by scanning electron microscope (SEM), gel permeation chromatogram (GPC), FT-IR and UV-Vis spectroscopy, and the photoinduced weight-loss. The results show that PS-G-TiO2 nanocomposite films could be efficiently photocatalytically degraded under UV illumination in air. The weight-loss of the PS-G-TiO2 film reached 29%; the average molecular weight reduced to 1/4 of the original molecular weight under UV-light irradiation for 300 h, implying that some benzene rings had been cleaved. The photocatalytic degradation mechanism of the films is briefly discussed.

• 出版日期2004-6-25
• 单位武汉大学