【作者】 高健；

【导师】 赵春禄；

【作者基本信息】 青岛科技大学 ， 材料物理与化学， 2005， 硕士

【摘要】 随着染料纺织工业的迅速发展,染料的品种和数量日益增加,印染废水己成为水系生态系统的重要污染源之一。印染废水的直接排放,导致对水生生物的生存产生严重危害的同时,使土壤性质恶化。 近几年固定相催化剂光催化降解印染废水技术引起了人们的广泛注意,载体一般选择石英砂,玻璃珠等材料。然而将其填充入反应器时,却因为催化床过于密实,阻碍了紫外线在反应器中的均匀分布,降低了紫外线的使用率。为了增加催化剂的活性,研究人员多将注意力放在过渡金属的掺杂和贵金属的沉积上,表面的形貌修饰研究较少。 本实验以玻璃弹簧作载体,浸入Ti（OH）₄与溶胶-凝胶的质量体积比为1.6∶1（g/L）的悬浊液中,以0.5mm/s的速度提拉,镀膜四层,510℃煅烧。用这种工艺制得的催化剂表面具有微米级凹凸、粒径50nm左右、粒子间有微孔、膜层厚度均匀、负载强度高。填充入催化床后,紫外光分布较均匀。 用此催化剂降解普拉红b时发现:普拉红b的降解会产生酸性物质。反应体系中在pH值较高的条件、较快的流速条件下有利于光催化的进行,初始浓度越低脱色率越高;温度影响不成规律;当温度50℃、流速20ml/s、pH值13、浓度10mg/L时,得到脱色率可达88.62%。最高降解初始浓度应低于15mg/L。 用此催化剂降解活性深蓝k-r发现:较高酸性条件、较高的温度,较慢的流速条件下有利于光催化的进行,初始浓度越低降解率越高;在浓度为30mg/l,紫外光强为2100μw/cm²时,辐照宽度有3cm左右。当温度50℃、流速5ml/s、pH值3、浓度20mg/l时,得到最高的脱色率94.7%,COD去除率可达80.7%。最高降解初始浓度应低于30mg/L。凹凸膜比没有掺杂Ti（OH）₄烧制的膜的脱色率要高9.6%。更多还原

【Abstract】 Recently, dyeing wastewater has become one of the most important contaminators in water ecosystem alone with the development of the dye-spin industry and the increase of the variety and quantity of the dyes. Dyeing wastewater, discharged directly, endangered the subsistence of the hydrobiology and deteriorated the quality of soil.Nowadays, many research focused on the degradation of dyeing wastewater using coated-catalysts by UV irradiation. In previos work, quartz sand and glass beads as carriers were filled in the reactor. However, they usually obstructed the UV’s distribution uniformity which lead to lower UV efficiency. For enhancing the activity of the catalysts, researchers paid more attention to doping transition metal ions and depositing of the noble metal in catalysts, but few to the modification of the surface morphologies of coated-catalysts.In this thesis, we chose glass springs as carriers to prepare the accidented TiO₂ film as catalysts. In a typical process, the springs were immerged in the suspend liquid prepared by the mixing of the Ti（OH）₄ nanoparticles and TiO₂ sol whose ratio of quality to volume was 1.6:1（g/L）, then drew out with the velocity of 0.5mm/s. After repeating the step above four times and calcining the precursor in 500 °C, we更多还原