Photocatalytic Degradation of Methyl Orange by Chitosan Modified TiO2Reportar como inadecuado




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A chitosan modified TiO2 CTS-TiO2 photocatalyst was prepared by a sol-gel method and used for degrading methyl orange. The photocatalyst was characterized by XRD, BET and TEM techniques. The characterization results show that the addition of chitosan can decrease agglomeration in crystallization. CTS-TiO2 shows higher photocatalytic activity than pure TiO2 in degrading methyl orange. During degradation of methyl orange pH = 6.0 with the presence of CTS-TiO2 1.0 g-L and UV light intensity = 6 mW-cm2, its removal rate reaches 48 % at 60 min oxidation time, only 32 % using pure TiO2 as photocatalyst. In addition, the degradation efficiency of methyl orange was significantly affected by oxygen flow rate, catalyst dosage and light intensity.

KEYWORDS

chitosan modified TiO2; photocatalysis; methyl orange

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Autor: Ping Lu, Yuan Jing, Qiuyun Zhang, Hongkun Ying, Laisheng Li

Fuente: http://www.scirp.org/



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