磁场作用下的苯酚光催化氧化反应研究

【作者】 王伟忠；

【导师】 柳丽芬；

【作者基本信息】 大连理工大学 ， 化学工艺， 2004， 硕士

【摘要】 本文研究了磁场作用对光助Fenton试剂氧化降解苯酚反应的影响和在TiO₂催化剂上的苯酚溶液光催化氧化反应。在Photo-Fenton反应体系中引入磁场作用改变了苯酚溶液光催化氧化的反应进程。在空气流量为400ml／min，苯酚水溶液通过磁场的流速为100mm／s，预磁化时间为5min时，获得最佳磁化效果：苯酚去除率增加了10％，COD去除率增加了7％。此条件下未测到磁化作用对TOC去除率的影响。通过动力学分析表明，磁场作用提高了反应速率常数。 在TiO₂催化剂上的苯酚溶液光催化氧化反应中，着重研究了热处理过程中的温度和气氛对以钛酸四丁酯为原料，采用水解过程制备的TiO₂在各种光源下的光催化活性。主要考察了催化剂在紫外光、日光灯、太阳光下的光催化活性，发现在催化剂中引入碳、氮等元素可提高催化剂在可见光范围内的光催化活性。在太阳光照射下，反应90min后100ppm苯酚转化率达到了25％。更多还原

【Abstract】 The effect of magnetic field on the oxidation of phenol solution with UV/Fenton reagent and Photo-catalytic degradation of phenol by using titanium dioxide were investigated. The enhancement of 10% phenol conversion and 7% COD removal was achieved after 5min magnetization before UV irradiation, at 400ml/min air flow, 100mm/s liquid flow rate through the magnetic field. Effect of magnetic field on TOC removal was not detected under current test condition. Through kinetic analysis, it is shown that magnetic field effect increased the reaction constant.Photo-catalytic degradation of phenol solution by using titanium dioxide prepared with hydrolysis Tetra-n-butly titanate was studied with different kinds of light sources. The photo-catalytic activities of the prepared samples were evaluated by measuring the phenol conversion. Results indicated that the solar is more applicable for photo-catalytic reaction than fluorescence. The 25% phenol conversion was achieved after 90min of reaction time. Analyzing the mechanism of photons attaching the catalyst particles and spectrum of the light sources, it could be confirmed that a mount N and C doped can greatly enhance light adsorption range of titanium dioxide, which make it possible that degrades organic under solar ray.更多还原