【摘要】 以高压汞灯为光源 ,采用浸涂 -烧结法制备的负载型纳米TiO2 作为光催化剂 ,通过对水中微量溶解性间二甲苯的光催化氧化过程的研究表明 ,初始浓度在 6 .6 8— 17.36mg/L的范围内 ,间二甲苯的光催化反应遵循表观一级反应动力学规律 ,反应的表观速率常数随溶液初始浓度的增大而减小 ,半衰期则随初始浓度的增大而增加 ,经 1.5h反应后 ,溶液中间二甲苯的去除率从 17.36mg/L的 5 4 .4 4 %增加到 6 .6 8mg/L的 75 .90 %。更多还原

【Abstract】 Under illumination by high pressure Hg lamp and catalyzed by immobilized nanometer TiO 2 photo catalyst prepared by dipping sintering process, it was shown that the reaction of photo catalysis for soluble m xylene was in conformity with the first order kinetics law in appearance. From 6.68 to 17.36 mg/L of initial concentration of m xylene in water, the apparent rate constant of the reaction decreased with increasing of initial concentration and half life period of the reaction increased as initial concentration of m xylene in water increased. The removal ratio of m xylene increased from 54.44% at concentration 17.36 mg/L to 75.90 % at 6.68 mg/L after 1.5 hour of reaction.更多还原