二氧化钛光催化降解有机污染物的性能研究

精品

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

感谢下载载

精品

感谢下载载

精品

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

感谢下载载

精品

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

感谢下载载