摘要
采用金属Ag,Fe3+和Cu2+等离子在几种改性条件下对处理TiO2光催化活性的影响,并对光催化机理和反应动力学作了初步探讨。结果表明,与未改性样品比较,处理后的TiO2的光催化活性得到了明显提高。对Ag改性后的TiO2进行红外干燥和超声波振荡处理,对Fe3+改性后的TiO2进行磁处理,催化活性进一步提高。试验中光催化氧化过程反应的控制为表面反应控制,在低反应浓度条件下,反应级数为宏观一级。
This paper investigates the effect of metal or ions,such as Ag,Fe3+ and Cu2+,on the photocatalytic oxidation in aqueous titanium dioxide suspension under several modificatory condition,and discusses the mechanism and reaction kinetics. The results indicate that, compared with the untreated sample, the modificated TiO2 exhibit higher photocatalytic activity, especially those AgTiO2 treated by infrared drying and ultrasonic wave shaking and the Fe3+TiO2 treated by magnetism. The surface reaction controls the photocatalytic progress and under the low density condition, the reaction series is one.
出处
《武汉科技大学学报》
CAS
2003年第3期247-250,共4页
Journal of Wuhan University of Science and Technology
基金
湖北省教育厅重点科研资助项目(2002A000109).
关键词
改性TiO2催化剂
难降解有机物
光催化
污水处理
modificated catalyst of TiO_2
hard degradated organic compound
photocatalysis
waste water treatment
