An Effective Novel ReactionSystem For The Photo Degradation of Aqueous Organic Pollutants

A novel reaction system consisted of a supported TiO2 film electrode, a Ru?Ti oxide film electrode and air (oxygen) electrode is reported. The air (oxygen) electrode can provide H2O2 continuously for homogeneous photochemical oxidation reaction on the spot. In this reactor, degradation reaction of aniline occur from interface of TiO2 film to all solution which is irradiated by ultraviolet ray. The degradation rate of aniline was characterized by measuring the change of chemical oxygen demand (COD) in solution under different conditions. It was found that the degradation rate of aniline in the novel system increased apparently as compared with single heterogeneous photocatalysis and homogeneous photochemistry system. It can be explained in terms of combining acts of heterogeneous photocatalysis and homogeneous photochemistry.

光催化与光化学联合降解苯胺

水中许多难于被其它方法降解的有机污染物（例如卤代烃、表面活性剂、多氯联苯、染料等）能在ＴｉＯ２的光催化作用下发生矿物化的降解反应，被氧化为ＣＯ２、Ｈ２Ｏ等简单的无机物，对环境不会带来二次污染［１～３］．近年来有关ＴｉＯ２纳米晶（或微晶）膜的制备与光催...

在新型光解反应体系中降解乙酰丙酸

介绍一种新型的光解反应体系. 该体系用空气(氧)电极作负载型TiO2 光催化膜的对电极. 空气(氧)电极是以空气中的氧作反应物,在电催化剂的作用下合成H2O2,为光化学氧化反应提供廉价的原料. 将空气(氧)电极应用于光催化反应体系,使光化学氧化反应和光催化氧反应同时发生于同一体系. 实验结果表明,在相同的光照条件下,乙酰丙酸在新型光解反应体系中的降解速度比在单一的光催化体系中或在光化学反应体系中明显增大.