负载型共掺杂TiO_2对城市废水的日光降解作用  

Performance of Sunlight Catalytic Degradation of Urban Waste water of Carried Co-doped TiO_2

作　　者：薛茹君[1] 代新营[1] 黄静[1] 

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《安徽理工大学学报（自然科学版）》2011年第4期9-12,共4页Journal of Anhui University of Science and Technology:Natural Science

基　　金：安徽省教育厅自然科学研究重大基金资助项目(ZD200903);淮南市科技专项基金资助项目

摘　　要：采用过渡金属与稀土离子共掺杂对TiO2/漂珠光催化剂进行改性,以提高其日光催化性能。以紫外-可见漫反射光谱研究了粉煤灰微珠负载共掺杂TiO2光催化剂的光吸收性能;考察了催化剂对城市废水的日光催化降解性能。实验结果表明:所制备的各种共掺杂TiO2/漂珠催化剂在太阳光照射下对有机废水有较好的降解效果;废水的pH=6.5、催化剂投入量为3.5g/L时,其降解率最大,日光照射5 h后,降解率可以达到85.12%(CODCr)和73.4%(NH3-N)。催化剂使用后可以活化再生2次。TiO2/cenosphere photocatalyst was modified via co-doped with transition metal ions and rare earth metal ions to raise its sunlight catalytic activity.Sunlight absorption performances of the co-doped TiO2/cenosphere photocatalysts were investigated by UV-visible spectrophotometer.The degradation capacities of city waste water on the co-doped TiO2/cenosphere photocatalysts were studied.The results show that the sunlight photocatalytic activity of the co-doped TiO2/cenosphere was better.They possess the best degradation capacity when the pH value of waste water = 6.5 and the catalyst dosage at 3.5 g/L.The degradation rate of city waste water could reach 85.12%（CODCr） and 73.4%（NH3-N） after 5 h sunlight irradiation.The used-up photocatalyst could be reactivated 2 times.

关 键 词：日光降解 共掺杂TIO2 城市废水 

分 类 号：O614[理学—无机化学]