Study on photodegradation of Azo dye by polyoxometalates/polyvinyl alcohol
来源期刊：JOURNAL OF RARE EARTHS2009年第5期
论文作者：FENG Changgen ZHUO Xiaoxi LIU Xia
Key words：polyoxometalates; polyvinyl alcohol; degradation; azo dye; rare earths;
Abstract: A series of photocatalysts, K11[Ln(PW_(11)O_(39))_2]/PVA (Ln=La, Ce, Pr, Nd, Sm) were prepared by K11[Ln(PW_(11)O_(39))_2] (Ln=La, Ce, Pr,Nd, Sm) containing five kinds of lanthanides and polyvinyl alcohol as the support. The catalysts obtained were characterized by Fourier trans-form infrared spectra, UV-vis spectra, powder X-ray diffraction, and scanning electron microscopy, indicating that the structure of K11[Ln(PW_(11)O_(39))_2] and polyvinyl alcohol remained intact, respectively. The photocatalysts exhibited efficient catalytic activity to degrade methyl orange, Congo Red, Ponceau 2R. The maximal degradation conversions of the three kinds of dyes were 99.58%, 47.61%, 72.42%, respectively.
FENG Changgen1，ZHUO Xiaoxi1，LIU Xia2
(1.State Key Laboratory of Explosion Science and Technology , Beijing lnstitute of Technology, Beijing 100081, China;
2.College of Science, China Agricultural University,Beijing 100094, China)
Abstract:A series of photocatalysts, K11[Ln(PW_(11)O_(39))_2]/PVA (Ln=La, Ce, Pr, Nd, Sm) were prepared by K11[Ln(PW_(11)O_(39))_2] (Ln=La, Ce, Pr,Nd, Sm) containing five kinds of lanthanides and polyvinyl alcohol as the support. The catalysts obtained were characterized by Fourier trans-form infrared spectra, UV-vis spectra, powder X-ray diffraction, and scanning electron microscopy, indicating that the structure of K11[Ln(PW_(11)O_(39))_2] and polyvinyl alcohol remained intact, respectively. The photocatalysts exhibited efficient catalytic activity to degrade methyl orange, Congo Red, Ponceau 2R. The maximal degradation conversions of the three kinds of dyes were 99.58%, 47.61%, 72.42%, respectively.
Key words:polyoxometalates; polyvinyl alcohol; degradation; azo dye; rare earths;
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