添加剂对有机颜料光催化降解的影响  

Effects of Additives on Photocatalytic Degradation of Pigment Brilliant Red 6B

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300072 [2]中国科学院化学研究所分子科学中心光化学重点实验室,北京100080

出　　处：《催化学报》2004年第4期293-296,共4页

基　　金：教育部留学回国人员科研启动基金资助项目 (教外司留 2 0 0 2 2 47);中国科学院化学研究所光化学重点实验室开放基金资助课题

摘　　要：研究了 (NH4) 2 S2 O8,H2 O2 和表面活性剂十二烷基苯磺酸钠 (DBS)对TiO2 光催化降解颜料艳红 6B的影响 .结果表明 ,(NH4) 2 S2 O8的加入可提高颜料艳红 6B的降解速率 ,以酸性及近中性条件较为适宜 ;H2 O2 的加入也可提高颜料艳红 6B的降解速率 ,并可提高TiO2 的重复使用次数 ;DBS的加入可降低颜料艳红 6B的降解速率 ,但颜料艳红 6B在酸性和碱性条件下降解较中性条件下快 .DBS在中性条件下降解较快 .颜料艳红 6B与DBS二者之间存在密切的共降解关系 .随着DBS浓度的增加 ,颜料艳红The effects of additives (NH 4) 2S 2O 8, H 2O 2 and surfactant sodium dodecyl benzene sulfonate (DBS) on the photocatalytic degradation of pigment brilliant red 6B in the presence of TiO 2 were studied. The pigment brilliant red 6B, TiO 2, additives and deionized water were added into a beaker. After stirred for 0.5 h with a magnetic stirrer in the dark, the mixture was irradiated with a high-pressure Hg lamp (100 W, λ=365 nm). The discoloration time of the mixture was used to evaluate the degradation of pigment brilliant red 6B, which was not dissolved completely in water without DBS. The concentration of pigment brilliant red 6B in the presence of DBS was determined with UV-Vis spectrophotometer because of the increased solubility. (NH 4) 2S 2O 8 accelerated remarkably the photocatalytic degradation of the water-insoluble pigment brilliant red 6B. The acidic medium was suitable for the degradation of pigment brilliant red 6B in the presence of (NH 4) 2S 2O 8. H 2O 2 also enhanced the degradation rate of pigment brilliant red 6B. The reused numbers of TiO 2 were increased with the addition of H 2O 2 and with the increase of temperature, and H 2O 2 could be efficiently utilized. DBS decreased the degradation rate of pigment brilliant red 6B. The degradation of pigment brilliant red 6B in acidic and alkaline conditions was greater than that in neutral condition in the presence of DBS. On the contrary, the degradation rate of DBS was slightly greater in neutral condition. The co-degradation of pigment brilliant red 6B and DBS was measured.

关 键 词：颜料艳红6B 光催化降解 二氧化钛 过硫酸铵 过氧化氢 十二烷基苯磺酸钠 有机颜料 添加剂 

分 类 号：X788[环境科学与工程—环境工程]