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Citation: XIONG Yu-hua, LI Feng-yi. Degradation of Polyethylene Film by Fe³⁺/TiO₂ Photocatalyst[J]. Acta Physico-Chimica Sinica, ;2005, 21(06): 607-611. doi: 10.3866/PKU.WHXB20050606 shu

Degradation of Polyethylene Film by Fe³⁺/TiO₂ Photocatalyst

XIONG Yu-hua ,
LI Feng-yi

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

Received Date: 25 October 2004
Available Online: 15 June 2005

Nano-sized TiO₂ doped with different percentage of Fe³⁺was prepared quickly by sol-gel process and was first used as photocatalyst to degrade polyethylene(PE) film under UV (intensity of 60 W) irradiation for 240 h in the ambient air. Some properties of photocatalysts and PE films were characterized by the means of XRD, FT-IR and SEM. The results claimed that PE lost only 8.43%(w) of its mass under UV irradiation for 240 h, anatase TiO₂ made PE film lost 30.66%(w). 0.5% Fe₂O₃/TiO₂, 1.0%Fe₂O₃/TiO₂ and 2.0% Fe₂O₃/TiO₂ made PE lost their weights 35.91%(w), 20.72%(w), and 13.30%(w), respectively. Photocatalysts speeded the PE macromolecular chains scission and photo oxidation. SEM morphology of PE film after photodegradation showed that there were numerous pits and holes in the film. The XRD patterns indicated that products contained more wax in PE film than that in PE film without photocatalysts. There was an optimal content of doping Fe³⁺ in anatase TiO₂. 0.5%Fe₂O₃/TiO₂ had a higher activity in photdegradation of PE film than other TiO₂ photocatalysts.
- Nano-sized TiO₂;Fe³⁺ doping;Polyethylene film; Photocatalysis degradation reaction in solid-phase
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Degradation of Polyethylene Film by Fe³⁺/TiO₂ Photocatalyst