一种光催化体系光催化降解苯胺的研究

以钛酸丁酯为原料．以膨润土为载体，用酸性溶胶法合成TiO2纳米复合物，并利用该复合物作催化剂，在H2O2存在下进行光催化降解苯胺溶液。结果表明，该催化剂在UV／H2O2系统中对苯胺溶液有很好的光催化降解效果，其效果优于纯TiO2；H2O2的存在提高了苯胺光催化降解速率，在本实验条件下其最佳摩尔浓度是5mmol／L；溶液pH是影响反应速率的重要因素．pH在中性范围内具有更强的光催化活性；该体系中苯胺能够有效地被降解，其光催化反应遵循一级反应动力学规律。

Photocatalytic degradation of aniline using TiO2 nanocomposite/UV/H2O2 system

Titanium dioxide nanocomposite prepared by acid catalyzed sol method was used as a photocatalyst in the reaction of aniline decomposition in water with the attendance of UV and H\-2O\-2. The results showed that the nanocomposite photocatalysts have a good effect on degradation of aniline in the addition of H\-2O\-2.They were even better than the reagent of TiO\-2 .The speed of reaction was evaluated when H\-2O\-2 attended the experiment. Result also indicated that the development amount of H\-2O\-2 could improve the degradation rate. The optimum dose of H\-2O\-2 was 5 mmol/L according to the balance of reactivity and economic benefits. The effect was the best when the pH of solution around 7. The reaction of photo catalysis for aniline in this system was effective and it was in conformity with the first order kinetics law in appearance.