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总磷是检测水体富营养化的重要指标,因此研究其消解具有重要的意义。总磷的消解方法有很多,例如传统的高温消解、微波消解、紫外消解、电催化消解、光催化消解等,但是既高效又简易洁净的消解方法仍在不断的研究中。研究了一种基于光电催化的总磷的消解方法,通过在二氧化钛工作电极和对电极之间外加适当的电压来减少电子-空穴对的复合。介绍了用于总磷的光电催化消解中的光催化剂的二氧化钛纳米管的阳极氧化法制备、特性表征及其用于总磷的光电催化消解。阳极氧化法制备的二氧化钛纳米管具有较好的催化活性。将其用于总磷的光电催化消解实验,当2V电压协助光催化消解2h后,消解率达到65.4%,较光催化高了20.7%,较电催化高了61.3%。实验结果表明,与光催化消解、电催化消解方法相比,通过在工作电极和对电极之间添加适当的外加电压的光电催化消解方法可以有效地提高总磷的消解率。
Total phosphorus is an important indicator of water eutrophication, so it is of great significance to study its digestion. Total phosphorus digestion methods are many, such as the traditional high-temperature digestion, microwave digestion, UV digestion, electrocatalytic digestion, such as photocatalytic digestion, but both efficient and easy to clean digestion method is still ongoing research. A method for digestion of total phosphorus based on photoelectrocatalysis was studied to reduce electron-hole pair recombination by applying an appropriate voltage between the working electrode and the counter electrode of titanium dioxide. The preparation and characterization of titania nanotubes for the photocatalytic digestion of total phosphorus in the photocatalyst are described. The photocatalytic digestion of TP is also introduced. Titanium dioxide nanotubes prepared by anodic oxidation have better catalytic activity. The photoelectrocatalytic digestion experiment of total phosphorus showed that the digestion rate reached 65.4% after photocatalytic digestion with 2V voltage for 2h, which was 20.7% higher than that of photocatalysis and 61.3% higher than that of electrocatalysis. The experimental results show that compared with the photocatalytic digestion and electrocatalytic digestion methods, the total phosphorus digestion rate can be effectively increased by adding the appropriate applied voltage between the working electrode and the counter electrode.