在新型光解反应体系中降解乙酰丙酸  

Degradation of Levulinic Acid in the Novel Photodegradation Reaction System

作　　者：蔡乃才[1] 王亚平[1] 王鄂凤[1] 彭正合[1] 

机构地区：[1]武汉大学化学与环境科学学院,武汉430072

出　　处：《武汉大学学报（自然科学版）》1999年第6期814-816,共3页Journal of Wuhan University(Natural Science Edition)

基　　金：国家自然科学基金!(10791033)

摘　　要：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.A novel photodegradation reaction system was introduced, in which the air (oxygen) electrode was used as counter elecrtode of supported TiO 2 film electrode. The reaction substance of the air (oxygen) electrode is oxygen in air, main product is H 2O 2,so the air (oxygen) electrode can provide cheap raw for photochemical induced oxidation. Whem the air (oxygen) electrode was applied to the photodegradation reaction system, photochemical induced and photocatalytic oxidation of pollutant proceeded simultaneously in the same system. The experiment results showed that there was higher rate of degradation of levulinic acid in the novel photodegradation reaction system than in only photocatalysis system or in system of photochemical induced oxidation without TiO 2, under condition of the same radiant intensity. The results were discussed in the paper.

关 键 词：负载型 薄膜 光解反应 乙酰丙酸 降解 二氧化钛 

分 类 号：O623.7[理学—有机化学] O644.1[理学—化学]