纳米TiO_2光催化性能的研究

应用低温热分解法制备锐钛型纳米 Ti O2 ,以主波长为 2 54nm的紫外灯作为光源 ,研究了纳米 Ti O2 对邻硝基酚的光催化降解规律 ,并与普通 Ti O2 进行了对比。结果表明 ,纳米Ti O2 表现出很高的光催化活性 ,降解邻硝基酚的速率约为普通 Ti O2 的 1倍以上 ,其降解过程符合一级动力学规律

A Study of Photocatalytic Properties of Nanosized Anatase TiO_2

In this paper, nanosized anatase TiO 2(particle size less than 10nm) has been prepared by using the cryo thermal decomposition method and the photocatalytic degradation of o nitrophenol in TiO 2 aqueous suspensions by a 254nm UV light source has been studied, Also, a comparison has been made with the marketed TiO 2. The results show that nanosized anatase TiO 2 has a much higher photocatalytic activity to the o nitrophenol than bulk TiO 2, and that the rate of nitrophenol degradation is roughly more than doubled that of the marketed TiO 2, whose degradation process is in coincidence with the first order kinetics.