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Citation: XINOG Yu-Hua, LI Feng-Yi. Photodegradation of Polyethylene Films Catalyzed by TiO₂[J]. Chinese Journal of Applied Chemistry, ;2005, 22(5): 534-537. shu

Photodegradation of Polyethylene Films Catalyzed by TiO₂

XINOG Yu-Hua ^a,b ,
LI Feng-Yi ^b,,

1.
a School of Material Science and Engineering, Nanchang University, Nanchang 330047;
2.
b Institute of Applied Chemistry, Nanchang University, Nanchang 330047

Corresponding author: LI Feng-Yi,
Received Date: 26 July 2004
Available Online: 13 October 2004
Fund Project:

A nano-size TiO₂ photocatalyst was prepared readily by the Sol-gel method,and was used to catalyze the degradation of PE films under UV (15 W intensity) irradiation for 240 h in air.The properties of the catalyst and the degraded PE films were characterized by XRD,FT-IR and SEM.The results show that PE films lose only 7.66% of its mass under UV irradiation for 240 h,while Rutile style TiO₂ and Anatase TiO₂ photocatalysts can increase the mass loss to 14.93%,and 23.97%,respectively,indicating that TiO₂ speeds up the breaking and photo oxidation of PE chains.The SEM micrograph of the PE film after photodegradation shows a large number of pits on the film surface.The XRD patterns indicate there was more wax in the degradation products in the presence of TiO₂.Anatase style TiO₂ exhibited a higher activity than Rutile style TiO₂ for the photodegradation of PE films.
- nano-sized TiO₂,
- photocatalysis in solid phase,
- polyethylene(PE) film,
- degradation
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Photodegradation of Polyethylene Films Catalyzed by TiO₂