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General Chemistry ›› 2017, Vol. 3 ›› Issue (3): 164-169.DOI: 10.21127/yaoyigc20170007

• Orginal Reports • Previous Articles    

Research on Photocatalytic Degradation of Methyl Orange by a β-Cyclodextrin/Titanium Dioxide Composite

Shuting Lu,Nan Sun,Ting Wang   

  1. College of Science, Northeast Forestry University, Harbin, Heilongjiang 150040, China
  • Received:2017-06-08 Accepted:2017-08-10 Online:2017-09-24 Published:2017-09-24
  • Contact: Ting Wang


A photocatalytic composite of β-cyclodextrin/titanium dioxide (β-CD/TiO2) was synthesized via the photoinduced assembly method in this work. The morphology of the composite was characterized by scanning electron microscope (SEM) and transmission electron microscopy (TEM), respectively. The chemical composition was detected by fourier transform infrared spectroscopy (FTIR). By means of phenolphthalein probe technique and back titration method, the contents of active β-CD (2.0%) and TiO2 (0.0971±0.0006 g/0.1 g) in the prepared β-CD/TiO2 composite were obtained. In order to investigate deeply the role of β-CD in TiO2 photocatalytic system, 100 mL of 0.1 mmol L-1 methyl orange (MO) aqueous solution was used as the organic pollutant, the photocatalytic activity of β-CD/TiO2 and pure TiO2 were assessed under the same conditions. The results showed that the degradation time of β-CD/TiO2 was 43% shorter than that degraded by the aqueous solution containing only TiO2. β-CD/TiO2 demonstrated a better photocatalytic activity. The kinetics of photocatalytic degradation of MO by β-CD/TiO2 and pure TiO2 was studied. In addition, the degradation efficiency of MO by β-CD/TiO2 was still above 85% after recycling for 5 times.


Key words: β-cyclodextrin, titanium dioxide, methyl orange, mechanism, photocatalytic degradation

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