Journal of Sol-Gel Science and Technology

, Volume 75, Issue 1, pp 152–163 | Cite as

Removal of dyes by photocatalytically active curcumin-sensitized amorphous TiO2 under visible light irradiation

  • Supat Buddee
  • Sumpun WongnawaEmail author
Original Paper


Curcumin-sensitized amorphous TiO2 (Cur-AMO) was prepared by the sol–gel process followed by modified impregnation using freshly prepared curcumin solution. The final products were studied by several techniques such as X-ray diffraction, scanning electron microscopy, transmission electron microscopy, surface area measurement (BET), and UV–Vis diffused reflectance spectroscopy. Experimental results revealed that the presence of curcumin did not affect the amorphous form; however, it caused bathochromic shift and decreased the BET surface area. The products showed not only high adsorption efficiency but also increased photocatalytic activity under visible light irradiation with optimal result at 7.5 wt% curcumin loading. Under visible light irradiation, curcumin molecule could act like dye-sensitizing agent by injecting the electron into the conduction band of amorphous TiO2, leading to photodegradation of pollutant in wastewater.

Graphical Abstract


Amorphous TiO2 Photocatalyst Curcumin Dye sensitizer Visible light photodegradation Dye degradation 



This research was supported by the Center of Excellent for Innovation in Chemistry (PERCH-CIC), Office of the Higher Education Commission, Ministry of Education, and the Graduate School, Prince of Songkla University.


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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Chemistry and Center for Innovation in Chemistry, Faculty of SciencePrince of Songkla UniversityHat Yai, SongkhlaThailand

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