新型双功能复合电极的制备及其加速水中有机污染物降解作用的研究

介绍了新型复合电极的制备方法、其双功能特性以及在提高水中有机污染物(如苯胺)降解速度所起的作用,并对其作用机制进行了讨论.实验结果表明,由空气电极和TiO₂光催化剂组成的复合电极,当其工作电位控制在0.05V(vs.SCE)左右时,既具有良好的光电效应,又具有以较高效率合成H₂O₂的特性,使溶液中的有机分子获得来自光催化氧化与光化学氧化两方面的联合降解作用,从而显著地提高了有机分子的氧化降解速度.

Preparation of the Novel Double-functional Composite Electrode and Its Role on the Degradation of Organic Pollutants in Water

The methods for preparing the novel composite electrode, the double function of the novel composite electrode and the role of it on increasing the degradation rate of the organic pollutants(such as aniline) in water are introduced. The reaction mechanism is also discussed. The results indicate that when the working potential was controlled at 0.05 V or so, the composite electrode made up of the carbon PTFE(air) O 2 electrode and the TiO 2 photo catalyst not only possesses photocurrent effect but also has a high efficiency of generating H 2O 2. Then the organic molecule in solution can obtain two kinds of roles on degradation coming from the combination of the photo catalysis and the photochemical oxidation. The rate of degradation of the organic molecule is obviously enhanced.