| When nano-semiconductors are irradiated with specific wavelength light under given chemical circumstance, some radical species (such as hydroxyl radical, bearing strong oxidizing power) could be generated and degrade effectively abroad range of organic pollutants in the environment. This method has been as one pioneering field of nanotechnology and environmental research. Photocatalysis, using nano-semiconductor materials as photocatalysts, is defined in the area of heterogeneous catalysis, and is branched from Advanced Oxidation Processes (AOPs) for the removal of organic compounds, which are hazardous to our health. Due to its effective performance, easy operation and low cost, photocatalysis can be more interesting than conventional biological, physical and chemical treatment.In this paper, we prepared nanotublar TiO2 photoanode in DMSO by electrochemical synthesis, and detected the direct effect of anions as the supporting electrolyte on photocurrent, which was tansformed from photoanode under UV irradiation. We used m-and p-nitroaniline as model organic pollutants, and analyzed the different degradation results with UV-visible spectrophotometer and gas chromatography-mass spectrometry (GC-MS) after UV photolysis, photocatalysis, and the external current-assistanted photoelectrocatalysis, respectively. Our studies showed that with suitable external current assistance, nanotublar TiO2 photoanode would behave better as photocatalyst. Simultaneously, we conducted the fundamental research for practical application of the organic pollutants degradation and the environmental protection on nanotublar TiO2 photoanode.
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