The Photoelectrochemistry of TiO₂-Polyaniline Composite Film

Authors

Huai-guo HUANG, State Key Lab. for Phys. Chem. of the Solid Surface, Dept. of Chem., Inst. of Phys. Chem., Xiamen Univ., Xiamen, 361005, China
Zhi-xin ZHENG, State Key Lab. for Phys. Chem. of the Solid Surface, Dept. of Chem., Inst. of Phys. Chem., Xiamen Univ., Xiamen, 361005, China
jin LUO, State Key Lab. for Phys. Chem. of the Solid Surface, Dept. of Chem., Inst. of Phys. Chem., Xiamen Univ., Xiamen, 361005, China
Hong-ping ZHANG, State Key Lab. for Phys. Chem. of the Solid Surface, Dept. of Chem., Inst. of Phys. Chem., Xiamen Univ., Xiamen, 361005, China
Ling-ling WU, State Key Lab. for Phys. Chem. of the Solid Surface, Dept. of Chem., Inst. of Phys. Chem., Xiamen Univ., Xiamen, 361005, China
Zhong-hua LIN, State Key Lab. for Phys. Chem. of the Solid Surface, Dept. of Chem., Inst. of Phys. Chem., Xiamen Univ., Xiamen, 361005, ChinaFollow

Corresponding Author

Zhong-hua LIN(zhlin@xmu.edu.cn)

Abstract

A TiO₂ and polyaniline (PANI) composite film was obtained by electrochemical methods. The SEM image of the composite film showed that the PANI film is almost completely covered with TiO₂ efficiency. The spectra of photocurrent for the TiO₂-PANI composite film were different from these of TiO₂ film photosensitized by PANI. The bandgap energy of TiO₂ film on partially oxidized PANI film was determined as 3.0 eV by the threshold energy of photocurrent band for TiO₂. The spectra of photocurrent for partially oxidized PANI film electrode suggested that it has the characteristics of sub band gap spectra of photocurrent and followed Fowler rule. The bandgap energy of insulating matrix in partially oxidized PANI is determined as 3.33 eV by the Flowler plots, and the insulating matrix in partially oxidized PANI was verified to be reduced PANI. The flat band potentials, in the order of 0.87 V vs. NHE for partially oxidized PANI and 0.09V vs. NHE for TiO₂ PANI composite film in 1.0 mol/L HClO₄ solution, were obtained from Mott Schottky plots. The doping content of partially oxidized PANI and TiO₂-PANI composite film are 5.3×10¹⁸ cm^-3 and 9.1×10¹⁹ cm^-3, respectively. The photoelectrochemical process of TiO₂-PANI composite film is interpreted and the energy diagram is proposed. The TiO₂-PANI composite film can be well used for treating the wastewater, for example, containing phenol.

Keywords

TiO2, Polyaniline, Photoelectrochemistry

DOI Link

https://doi.org/10.61558/2993-074X.1417

Publication Date

2001-02-28

Online Available Date

2001-02-28

Revised Date

2001-02-20

Received Date

2000-08-12

Recommended Citation

Huai-guo HUANG, Zhi-xin ZHENG, jin LUO, Hong-ping ZHANG, Ling-ling WU, Zhong-hua LIN. The Photoelectrochemistry of TiO₂-Polyaniline Composite Film[J]. Journal of Electrochemistry, 2001 , 7(1): 102-108.
DOI: 10.61558/2993-074X.1417
Available at: https://jelectrochem.xmu.edu.cn/journal/vol7/iss1/8