在具有现场合成H_2O_2电极的TiO_2光催化反应体系中降解SDS  

Degradation of SDS in the TiO_2-mediated Photocatalytic Reaction System With the Electrode by in Situ Synthesizing H _2O_2

作　　者：蔡乃才[1] 黄行九[1] 霍耀东[1] 王亚平[1] 王鄂凤[1] 

机构地区：[1]武汉大学化学与环境科学学院,湖北武汉430072

出　　处：《武汉大学学报（理学版）》2000年第6期663-666,共4页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目! ( 10 7910 3 3 )

摘　　要：采用一种新型空气 (氧 )电极作现场光化学反应的 H2 O2 发生源 .该电极用空气中的氧作反应原料 ,在电极的电催化作用下生成 H2 O2 ,电流效率最高可达 90 % ,而且对溶液的 p H适应范围较广 .将这种新型的空气(氧 )电极引入光催化反应系中 ,使“光化学氧化反应”和“光催化氧化反应”同时发生在同一体系 ,在不改变光照条件下可提高有机污染物的光氧化速度 .本实验测定结果表明 :在含空气 (氧 )电极的光催化反应体系中 ,十二烷基磺酸钠 ( SDS)A new type of electrode using air (oxygen) as reacting substance for producing H 2O 2, which has high current efficiency of synthesizing H 2O 2 (≈90%) and is suitable for various solutions of pH 4\|11, was applied in photocatalytic degradation of organic pollutant. Experemental results showed that there was higher rate of degradation of sodium lauryl sulfate in the TiO 2 photocatalysis system containing the electrode producing H 2O 2 than in TiO 2 photocatalysis system without the electrode producing H 2O 2 or in system of photochemical induced oxidation without TiO 2 film, under condition of the same radiant intensity. The results were discussed in this paper. \ \

关 键 词：空气(氧)电极 TIO2 光催化 光化学氧化 

分 类 号：O646.5[理学—物理化学]