TiO_2光催化降解吡啶的研究

以钛酸四丁酯水解法制备TiO2,采用溶胶-凝胶法在膨胀珍珠岩上负载TiO2,在UV-TiO2体系中对水中吡啶进行光催化降解,结果表明:TiO2加入量为1.25mg/mL,吡啶的光催化降解符合一级动力学方程,加入0.2%H2O2可明显加快吡啶的降解速度,吡啶中氮转化为氨氮,珍珠岩负载型TiO2与粉末TiO2具有相同的催化效能,且便于回收和重复使用。

A Study of Photocatalytic Degradation of Pyridine in TiO2 System

TiO 2 was prepared by a method of tetrabutyl titanate hydrolysis and was loaded onto ex panded pearlite by a pyrosol-gel method.The pyridine in water was photocatalytically degradated in a UV-TiO 2 system.The result of the test showed that the fed quantity of TiO 2 was1.25mg/mL,the photocatalyt ic degradation of the pyridine was in conformity with the first order kinetic equation,the feeding of0.2%H 2 O 2 obviously increased the degradation rate of the pyridine and the nitrogen in the pyridine converted into ammonia nitrogen;the pearlite-loaded TiO 2 had the same catalytic effect as that of powered TiO 2 and was easy to recover and reutilize.