二氧化钛光催化降解有机污染物的性能研究..doc

二氧化钛光催化降解有机污染物的性能研究 摘 要 本文以钛酸四丁酯为钛源，采取水热法制备了二氧化钛纳米材料，用X射线衍射，电子扫描电镜等方法对合成的TiO2进行表征。实验研究了在模拟自然光条件下纳米二氧化钛降解亚甲基蓝的光催化行为，优化了实验条件如温度、二氧化钛光催化剂的用量对光催化降解的影响。实验结果表明，常温下，对于40mg/mL的亚甲基蓝溶液，加入10mg的TiO2，光催化降解40min，降解率可达到89％，但是在此基础上改变用量都会导致光催化降解率的降低。 关键词： 纳米二氧化钛 水热法 光催化降解 亚甲基蓝  Properties of organic pollutants Photocatalytic Degradation ABSTRACT In this paper, titanium dioxide was prepared by hydrothermal method to prepare rutile titanium dioxide nanorods by using four butyl titanate as titanium source. On the basis of this study, the photocatalytic degradation of methylene blue under infrared light is studied. And through the adjustment of the experimental conditions such as temperature, pH, the amount of photocatalyst, it was concluded that the relative optimum conditions of photocatalytic degradation of methylene blue were obtained. In addition, by X-ray diffraction, cyclic voltammetry and scanning electron microscope (SEM) method of TiO2 nano meter sticks from the phase and microstructure were characterized. The experimental results show that the room temperature and for 40mg / mL of methylene blue solution, adding more than 1.0g of TiO2 photocatalytic degradation catalyst reaction 20MIN can achieve 89% of the degradation rate, but with the amount of catalyst increase and decrease, the degradation efficiency of catalyst will reduce, so the photocatalytic degradation should pay attention to the usage of catalyst, should not be too much, also should not be too little. Keywords Rutile Titanium Dioxide hydrothermal Photocatalytic Degradation of methylene blue  目 录 一 绪论 1 1.1 前言 1 1.2 纳米TiO2催化剂合成 2 1.2.1气相法 2 1.2.2 液相法 3 1.2.3 水热法 5 1.2.4 纳米TiO2的微观结构 6 1.2.5光催化降解原理 7 1.3纳米TiO2在废水处理上的应用 8 1.3.1含油废水 8 1.3.2制药废水 9 1.3.3印染废水 9 1.3.4造纸废水 9 1.3.5表面活性剂废水 9 1.3.6垃圾渗滤液 10 1.3.7重金属废水 10 1.3.8无机非金属废水 10 1.4 本文的研究意义，目的以及内容 10 第2章 实验部分 12 2.1实验药品与仪器 12 2.2 TiO2的合成与制备 12 2.3 TiO2光催化实验 13 2.3.1 实验装置的搭建 13 2.3.2亚甲基蓝光催化降解实验 14 第3章 实验结