In Situ Photoelectrodeposited Polyaniline on Ti-Doping Hematite For Highly Selective Photoelectrochemical Oxygen Demand Determination,Advanced Functional Materials

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In Situ Photoelectrodeposited Polyaniline on Ti-Doping Hematite For Highly Selective Photoelectrochemical Oxygen Demand Determination
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2024-09-17 , DOI: 10.1002/adfm.202413077
Jieyu Li _{1,

2} , Tongxin Tang _{1,

2} , Yushen Xiao _{1,

2} , Wenhao Zou _{1,

2} , Junwei Chen _{1,

2} , Sitong Ge _{1,

2} , Beibei Wu _{1,

2} , Lei Li _{1,

2} , Meng Li _{1,

2} , Zhan Lin _{1,

2} , Kai‐Hang Ye _{1,

2} , Shanqing Zhang _{1,

2}

Affiliation

Chemical Oxygen Demand (COD), as a detection indicator of water pollution, is of particular importance in assessing organic pollution in water. Furthermore, accurate and simple measuring COD methods are essential for water quality assessment and pollution control. However, the photoelectrochemical oxygen demand (PECOD) measurement, as one of the measuring COD methods, is affected by the reaction of water splitting, which is one of the hindrances to the commercialization of the analytical method of the PeCOD measurement. Hence, to overcome this challenge, a new PANI/Ti:Fe₂O₃ photoanode is constructed by hydrothermal and photoelectrochemical (PEC) deposition methods and investigated their optical properties and photoactivity. Under optimization conditions, it is discovered that the oxidation of organic compounds produces a net steady-state current (i_net) is directly proportional to COD concentration, with a detection limit of 1 mM glucose solution and a wide linear detection range of 1–78.125 mM, which is suitable for high concentration of glucose detection. As has been noted, PANI/Ti:Fe₂O₃ photoanode overcomes the obstacles to the practical application and eventual commercialization of the PECOD technology.

中文翻译：

Ti 掺杂赤铁矿上的原位光电沉积聚苯胺用于高选择性光电化学需氧量测定

化学需氧量（COD）作为水污染的检测指标，在评估水中的有机污染时尤为重要。此外，准确简单的测量 COD 方法对于水质评估和污染控制至关重要。然而，光电化学需氧量（PECOD）测量作为 COD 的测量方法之一，会受到水分解反应的影响，这是阻碍 PeCOD 测量分析方法商业化的障碍之一。因此，为了克服这一挑战，通过水热和光电化学（PEC）沉积方法构建了一种新的 PANI/Ti：Fe₂O₃ 光阳极，并研究了它们的光学性质和光活性。在优化条件下，发现有机化合物的氧化产生的净稳态电流（i_net）与 COD 浓度成正比，检测限为 1 mM 葡萄糖溶液，线性检测范围宽 1–78.125 mM，适用于高浓度葡萄糖检测。如前所述，PANI/Ti：Fe₂O₃ 光阳极克服了 PECOD 技术实际应用和最终商业化的障碍。

更新日期：2024-09-17

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