水中硝基酚的纳米TiO_2光催化降解

Photocatalytic Degradation of Nitrophenols with Nanosized Titania

以主波长254nm的紫外灯作为光源 ,研究了锐钛型纳米TiO2 对邻硝基苯酚、2,4_二硝基苯酚的光催化降解行为 ,并与普通TiO2 作了对比;结果表明 ,纳米TiO2表现出很高的光催化活性 ,催化降解过程符合一级动力学规律。

Nanosized titania(TiO2) with particle size less than 10 nm has been prepared by low _ temperature thermolysis. The photocatalytic degradation of o _ nitrophenol and 2,4 _ dinitrophenol with prepared TiO2 was studied using UV light source at 254 nm. The results showed that the nanosized TiO2 had much higher photocatalytic activity to both o _ nitrophenol and 2,4 _ dinitrophenol than commercially available TiO2, the degradation rates of both nitrophenols were above 90% in 60 min. Both nitrophenols degradation approximately followed the first order reaction kinetics.