作　　者： ; ; ; ; ; ;

机构地区： 广东工业大学轻工化工学院

出　　处： 《化学与生物工程》 2006年第11期10-12,共3页

摘　　要： 将TiO2光催化剂负载在活性炭/石墨载体上,通过高聚物固体电解质Nafion分隔阴、阳极,构成新型气相光电催化反应系统。光催化层的微多孔特性使催化剂活性大大增加,外加电压使光生空穴和光生电子得到有效分离,从而使环己烷的氧化降解速度显著提高。结果表明,当涂层数为3层、水蒸气与样品比率为20∶1、外加电压为20 V时,反应降解环己烷的效率最高。 A composite electrode of which TiO2 film is fixed on active carbon/graphite sheet is reported. By comparted the cathode and anode with high polymer solid electrolyte Nation, a novel system of gas phase-photoelectrocatalysis is formed. Catalytic activity is increased rapidly by micro-porous catalyst layer. Photogenerat- ed electrons can be removed from TiO2 electrodes before they could recombine with the holes by the application of a suitable external potential and thus the degradation rate of cyclohexane is enhanced promptly. The results show that the highest degradation rate is obtained when the coating layer of TiO2 is 3, the volume ratio between water vapor and specimen is 20：1 ,the external potential is 20 V.

关 键 词： 气相光电催化 微孔电极 环已烷 固体电解质 降解

领　　域： [理学] [理学] [环境科学与工程]