【作者】 耿静漪；

【导师】 朱新生； 杜玉扣；

【作者基本信息】 苏州大学 ， 纺织材料与纺织品设计， 2012， 硕士

【摘要】 中国已成为世界印染业中规模最大的国家。统计数据显示,纺织印染废水排放量约占我国工业废水排放量的35%。研究和探寻有效治理印染废水的方法和工艺,对于保护水环境,促进经济、社会和环境的可持续发展,具有十分重要的现实意义。本论文研究了几种负载型二氧化钛光催化剂,并应用于染料的光降解,主要研究工作如下：(1)采用溶胶-凝胶法制备了纳米TiO2/AC光催化剂,考察了TiO2/AC光催化剂对亚甲基蓝去除效果及机理。实验结果表明：活性炭载体提高了TiO2的光降解效率,当TiO2为0.5g/L, AC为0.2g/L时,光催化剂对亚甲基蓝溶液的光降解效果最好；随着亚甲基蓝溶液初始浓度的升高,催化剂的吸附及光催化降解效率均降低。三种阴离子对光催化效率造成的影响为NO3-> SO42-> Cl-。(2)采用溶胶-凝胶法制备了纳米WO3-TiO2/AC复合光催化剂,重点研究了钨元素的掺杂量、焙烧温度、溶液的酸碱度及盐酸处理对催化剂催化能力的影响。结果显示：相对于TiO2/AC和TiO2催化剂而言,WO3-TiO2/AC对罗丹明B的催化活性最高。(3)采用溶胶-凝胶法制备了TiO2与石墨烯(GE)复合光催化剂,通过对亚甲基蓝和罗丹明B的降解反应评价了复合光催化剂的光催化降解性能。结果显示,三种催化剂的催化活性顺序为：TiO2/GE-2> TiO2/GE-1> TiO2。(4)以导电碳纤维作为载体制备了TiO2/CF和GE/TiO2/CF复合催化剂,罗丹明B和亚甲基蓝的光催化降解试验结果表明GE/TiO2/CF较TiO2/CF具有更高的光催化活性。更多还原

【Abstract】 China has posessed the largest textile dyeing industry in the world, and the statistical data show that the wastewater effluents from textile industry account35percent of the total discharge of industrial wastewaters in China. Therefore, the development of effective technology for wastewater treatment has become very important for protecting water environment and promoting continuable development of economic, society and environment.In this thesis, the different supports are adopted to load TiO2as photodegradation catalysts and their degradation of dyes is studied. The primary contents are as follows:(1) Nano TiO2activated carbon (AC) photocatalyst was prepared by sol-gel method and its photocatalytic activity and degradation mechanism toward Methylene Blue (MB) was investigated. The results showed that photodegradation efficiency of TiO2is increased by adding AC. When TiO2was0.5g/L and AC was0.2g/L, the degradation efficiency of TiO2was the highest. Besides, the value of initial concentration of MB has an important impact on photocatalytic activity. The adsorption and photodegradation capacity decreases with the increase of initial concentration. Meanwhile, the effects of three anions of Cl-, SO42-and NO3-on the photocatalytic activity were also investigated, and the effect sequence is NO3-> SO42-> Cl-.(2) Nano tungsten trioxide (WO3)-TiO2/AC composite photocatalyst was also prepared by sol-gel method. The Factors such as doping amount of tungsten, calcination temperature, pH and hydrochloric acid treatment, which influence catalytic activity, were also investigated. Compared to TiO2/AC and TiO2catalysts, the WO3-TiO2/AC catalyst exhibits higher catalytic activity toward Rhodamine B(RhB).(3) TiO2/graphene (GE) composite photocatalyst was synthesized using the sol-gel method. The photocatalytic degradation activities of TiO2, TiO2/GE-1and TiO2/GE-2were evaluated on degradation of MB and RhB. The photocatalytic degradation activity sequences of the different catalysts are TiO2/GE-2> TiO2/GE-1> TiO2. (4) Using carbon fiber (CF) as the support, TiO2/CF and GE/TiO2/CF composite catalysts were prepared. The photocatalytic degradation activities of the catalysts toward MB and RhB were studied. The results of the photocatalytic degradation activities for MB and RhB showed that GE/TiO2/CF exhibits higher photocatalytic activity than TiO2/CF.更多还原