Anatase TiO2 photocatalysts with exposed (001) facets have attracted great attention for environmental protection technology due to their high reactivity for degradation of organic species. In this work, potassium hydrogen phthalate (denoted as KHP), as the most commonly used reference standard solution for calibrating photoelectrochemical chemical oxygen demand (denoted as PeCOD) instrument, was selected as the study sample. The intrinsic degradation kinetics of KHP on (001) surface was investigated by a photoelectrochemical (denoted as PEC) method with a purposely (001) faceted double-layered structure TiO2 photoanode. The high kinetics constants of fast process of KHP and other acids indicate that the (001) surface possesses a higher reactivity of aromatic carboxylic acid as theoretically predicted. Meanwhile, the investigation of the KHP adsorption properties on A001 photoanode provides the possibility of using this photoanode as a sensor in a new type of PeCOD instrument for organic acid determination.

中文翻译：

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锐钛矿001表面不同功能性芳香族有机物的降解动力学研究

锐钛矿二氧化钛2具有暴露(001)晶面的光催化剂由于其对有机物降解的高反应性而引起了环保技术的极大关注。本工作选用邻苯二甲酸氢钾（记作KHP）作为校准光电化学化学需氧量（记作PeCOD）仪器最常用的参考标准溶液作为研究样品。KHP 在 (001) 表面的内在降解动力学通过光电化学 (表示为 PEC) 方法与特意的 (001) 面双层结构 TiO2 进行了研究2光阳极。KHP和其他酸的快速过程的高动力学常数表明（001）表面具有理论预测的更高的芳族羧酸反应性。同时，对A001光阳极上KHP吸附特性的研究为将该光阳极用作新型有机酸测定PeCOD仪器的传感器提供了可能。