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Citation: SHI Jing-ying, LENG Wen-hua, CHENG Xiao-fang, ZHANG Jian-qing, CAO Chu-nan. Photocatalytic Oxidation of Methyl Red by TiO₂ in a Photoelectrochemical Cell[J]. Acta Physico-Chimica Sinica, ;2005, 21(09): 971-976. doi: 10.3866/PKU.WHXB20050906 shu

Photocatalytic Oxidation of Methyl Red by TiO₂ in a Photoelectrochemical Cell

1.
Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027; Department of Chemistry, Quanzhou Normal College, Quanzhou 362000

Received Date: 14 December 2004
Available Online: 15 September 2005

The kinetics for photocatalytic degradation reaction of methyl red, an azo dye, was investigated in a photoelectrochemical (PEC) cell, with titania thin film loaded on titanium as photoanode. The results showed that the degradation of methyl red was accelerated in PEC cell due to a reduced recombination of photogenerated carriers by the separation of the anodic and cathodic reactions. Under the same condition, an increase in photocurrent for PEC cell will suggest an improved rate of degradation. A thin SnO₂ film was applied as an interlayer between the substrate and the TiO₂ coating to obtain the assembled photoanodes, Ti/SnO₂/TiO₂, leading to a more separation efficiency of photogenerated carriers. Meanwhile, the photocatalytic activities of the electrodes were estimated by the electrochemical impedance spectroscopy (EIS).
- TiO₂;Methyl red;Photoelectrochemical cell;EIS
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Photocatalytic Oxidation of Methyl Red by TiO2 in a Photoelectrochemical Cell

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通讯作者: 陈斌, bchen63@163.com

Photocatalytic Oxidation of Methyl Red by TiO₂ in a Photoelectrochemical Cell