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Nano-sized TiO_2 doped La~(3+), was used as photocatalysis to degrade polyethylene (PE) film in solid-state reaction. It made PE lose its mass fraction of 14.5%, and formed more quantities of CO_2 and more wax yields after UV irradiation for 288 h. SEM imagines displayed more and bigger holes and pits in the PE film. FT-IR spectra showed that there is a lower absorbance of groups of -CH_2 and -CH_3 in PE/TiO_2 and 0.1% La_2O_3/TiO_2/PE composite materials than that in PE film sample of photodegradation, and more carbonyl groups in PE/0.1%La_2O_3/TiO_2. La~(3+) doping TiO_2 improves TiO_2 activities of oxidation and erosion of PE film under UV irradiation.
It made PE lose its mass fraction of 14.5%, and formed more quantities of CO_2 and more wax yields FT-IR spectra showed that there is a lower absorbance of groups of -CH_2 and -CH_3 in PE / TiO_2 and 0.1% La 2 O 3 / TiO 2 / PE composite materials than that in PE film sample of photodegradation, and more carbonyl groups in PE / 0.1% La 2 O 3 / TiO 2. La 3+ doping TiO 2 improves TiO 2 activities of oxidation and erosion of PE film under UV irradiation.