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Citation: GUO Jia-Hao, HE Xiao-Ying, CAI Sheng-Min, GUO Min, CHEN Xiu-Ying, PENG Xiao-Jun. Effect of Methanol on TiO₂ Nanocrystalline Electrode Sensitized by Cyanine Dye[J]. Chinese Journal of Applied Chemistry, ;2008, 25(7): 753-758. shu

Effect of Methanol on TiO₂ Nanocrystalline Electrode Sensitized by Cyanine Dye

1.
a College of Science, Anhui Science and Technology College, Fengyang;
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b College of Chemistry, China West Normal University, Nanchong;
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c College of Chemistry and Molecular Engineering, Peking University, Beijing 100871;
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d State Kay Laboratory of Fine Chemicals, Dalian University of Technology, Dalian

Corresponding author: CAI Sheng-Min,
Received Date: 4 July 2007
Available Online: 18 September 2007
Fund Project: 国家自然科学基金(20073003) (20073003)安徽省教育厅高校青年基金(2005jql089) (2005jql089)安徽科技学院引进人才专项基金(ZRC200438)资助项目 (ZRC200438)

The photoelectrochemical behavior of the TiO₂ nanocrystalline electrode sensitized by Cy3 (novel squarylium cyanine dye) was studied.The ground state level and the excited state level of the dye were determined by means of cyclic voltammetry and optical absorption spectroscopy.The results showed that the excited state level of this dye matches the conduction band edge of TiO₂ nanoparticles.Therefore the sensitization of TiO₂ nanocrystalline electrode with the dye can obviously increase the photocurrent density and result in a red-shift of optical absorption from the ultra-violet region to the visible region.As a result,the light-to-electricity conversion efficiency was greatly improved and the maximum value of IPCE reached 22.9% and η was 1.37% when the TiO₂ nanostructured porous film was 6.5 μm thick and was sensitized for 4 h.The values above mentioned could be improved to 29.0% and 1.51% after the sensitized electrode was treated with methanol.
- dye sensitization,
- TiO₂ nanocrystalline,
- photoelectrochemistry,
- cyanine dye,
- methanol
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Effect of Methanol on TiO₂ Nanocrystalline Electrode Sensitized by Cyanine Dye