添加剂对有机颜料光催化降解的影响  

The Effects of Additives on the Photocatalytic Degradation of Organic Pigment

作　　者：张天永[1] 朱丹丹[1] 张友兰[1] 崔新安[1] 赵进才[2] 

机构地区：[1]天津大学化工学院精细化工系,天津3000072 [2]中国科学院化学所光化学重点实验室,北京100080

出　　处：《染料与染色》2005年第1期58-59,52,共3页Dyestuffs and Coloration

基　　金：教育部留学回国人员科研启动基金(教外司留[2002]247号)中科院化学所光化学重点实验室开放基金

摘　　要：本文研究了添加(NH4)2S2O8,H2O2以及表面活性剂十二烷基苯磺酸钠(DBS)时,对TiO2光催化降解颜料艳红6B的影响。(NH4)2S2O8的加入可提高水溶性差的颜料艳红6B的降解速度,以酸性及中性条件较适宜。H2O2的加入可提高6B的降解速度,并且TiO2／UV／H2O2要比TiO2／UV或者H2O2／UV体系有效得多,可提高TiO2的重复使用次数及H2O2的利用率。阴离子型表面活性剂DBS的加入降低了6B的降解速度,但在酸性和碱性条件下,6B的降解较中性条件快;DBS的降解在中性条件下较好;二者存在密切的共降解关系。随着表面活性剂DBS浓度的增加。The effects of various additives of (NH4)2S2Ox, H2O2 and surfactant sodium dodecyl benzenesulfonate (DBS) on the photocata lytic degradation of pigment red 6B in the presence of TiO2 were studied in the present paper. (NH4)S2Ox accelerated the photocatalytic decomposition rate of pigment red 6B with poor solubility in water. The suitable pH values were acidic and neutral medium. Additive of H2O2 also enhanced the discoloration rate of pigment red 6B, and in case of TiO2/UV/H2O2the degradation was more efficient than in case of TiO2/ UV or M2O2/UV. The number of TiO2 reused was increased with the addition of H2O2 and H2O2 could be efficiently utilized as much as possible. The addition of DBS decreased the degradation rate of pigment red 6B. The degradation rate of pigment red 6B in acidic and alkaline conditions was faster than that in neutral medium. On the contrary, the degradation rate of DBS was slightly greater in the neutral. The co-degradation relationships occurred between DBS and pigment red 6B. The degradation rate of pigment red 6B and DBS decreased with the increase in the concentration of DBS.

关 键 词：有机颜料 光催化剂 添加剂 二氧化钛 降解 

分 类 号：TQ616.8[化学工程—精细化工]