TiO₂ nanotube array (TNA) electrode materials can effectively degrade organic compounds by photoelectrocatalysis. In this study, the depletion oxidation reaction in thin‐layer reactor was adopted, and the reaction characteristic and reaction mechanism of photoelectrocatalytic degradation of different types of organic pollutants by TNA electrode prepared by anodizing technology were studied. Moreover, the effective way to improve the photoelectrocatalytic degradation of organic compounds was discussed. Easily degradable glucose and hardly degradable succinic acid and phthalate were taken as the model compounds. The change characteristics of photocurrent reaction time of organic compounds in TNA photocatalysis thin‐layer reactor were analyzed. The I–t curve could reflect the change of reaction rate of organic compounds on TNA electrode surface. The influence of reactor volume and other parameters on the performance of organic photoelectrocatalysis was investigated. With the increase of the thickness of liquid layer in reactor, the reaction time of exhaustion oxidation of organic compounds increases correspondingly. The mechanism of synergetic photocatalysis was researched. In fact, the glucose contained many hydroxyl functional groups. Then, a large number of radicals were formed by photocatalysis, thus promoting the photocatalytic degradation of hardly degradable organic compounds.

中文翻译：

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TiO2纳米管阵列电极表面光电催化的反应机理。

TiO ₂纳米管阵列（TNA）电极材料可通过光电催化有效降解有机化合物。本研究采用薄层反应器中的耗尽氧化反应，研究了阳极氧化技术制备的TNA电极对不同类型有机污染物的光电催化降解的反应特性和反应机理。此外，讨论了改善有机化合物光电催化降解的有效途径。将易降解的葡萄糖和难降解的琥珀酸和邻苯二甲酸酯作为模型化合物。分析了TNA光催化薄层反应器中有机化合物光电流反应时间的变化特征。在我-牛逼曲线可以反映TNA电极表面有机物反应速率的变化。研究了反应器体积和其他参数对有机光电催化性能的影响。随着反应器中液层厚度的增加，有机化合物的耗尽氧化反应时间相应增加。研究了协同光催化的机理。实际上，葡萄糖含有许多羟基官能团。然后，通过光催化形成大量的自由基，从而促进难降解的有机化合物的光催化降解。