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Citation: LU Ping, LIU Bin, WU Feng, DENG Nan-Sheng. Formation of the Inclusion Complex of β-Cyclodextrin with Methyl Orange and Its Photocatalytic Decolorization[J]. Chinese Journal of Applied Chemistry, ;2003, 20(2): 108-111. shu

Formation of the Inclusion Complex of β-Cyclodextrin with Methyl Orange and Its Photocatalytic Decolorization

LU Ping ^a,b ,
LIU Bin ^a,c ,
WU Feng ^a ,
DENG Nan-Sheng ^a,,

1.
a Department of Environmental Science, Wuhan University, Wuhan 430072;
2.
b College of Chemical and Environmental Engineering, Jianghan University, Wuhan;
3.
c Department of Environmental and Chemical Engineering, Huangshi Polytechnic College, Huangshi

Corresponding author: DENG Nan-Sheng,
Received Date: 16 July 2002
Available Online: 18 November 2002
Fund Project: 国家自然科学基金资助项目(20177017) (20177017)

The formation constants of β-cyclodextrin(β-CD) inclusion complex with methyl orange were determined by fluorescence spectroscopy and the TiO₂ photocatalytic decolorization of the complex was studied by UV-vis spectral analysis. The results showed that the inclusion complex of β-CD with methyl orange in the mole ratio of 1:1(n(β-CD):n(methyl orange)) and 2:1 depended on the β-CD concentration with formation constants K_1:1=7.75×10⁵ L/mol and K_1:2=1.86×10⁴ L²/mol² respectively. The photocatalytic decolorization rate of methyl orange solutions was found to increase with addition of β-CD. The reaction rate increased at pH values of 2.0~4.5 and then decreased on increasing pH values to 12.0. The reaction rate droped with increasing oxygen concentration of the solution.
- β-cyclodextrin,
- methyl orange,
- inclusion complex,
- decolorization,
- TiO₂
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