不同材料负载Ani/TiO_2光降解印染废水  

Photocatalytic degradation of dyeing wastewater by different materials loaded Ani/TiO_2

作　　者：龚艳伟[1] 李晓秀[1] 樊颜波[1] 

机构地区：[1]首都师范大学资源环境与旅游学院,北京100048

出　　处：《环境工程学报》2013年第7期2641-2647,共7页Chinese Journal of Environmental Engineering

摘　　要：使用常见的工业材料:玻璃、铝片和镍网为载体,苯胺(Ani)作为氮掺杂剂,通过溶胶-凝胶法,制备了不同材料负载Ani/TiO2,并研究其在降解以酸性品红模拟的印染废水的光催化氧化性能。结果表明,玻璃、铝片和镍网负载Ani/TiO2最佳N/Ti值分别为0.250、0.040和0.040,并验证了N掺杂TiO2在日光利用方面的优势,提高了光催化剂的实际应用性;最佳pH值均为6～8;最佳处理初始浓度分别为10、12和12 mg/L;其光催化活性都会随着溶液深度的增加而降低;氧化剂硝酸铁的最佳投加浓度均为0.5×10-5到1.0×10-5mol/L;综合来看,玻璃负载Ani/TiO2的活性最高,铝片负载Ani/TiO2次之,镍网负载Ani/TiO2最差。Using glass,aluminum and nickel mesh as the carrier, which were common industrial materials,and aniline as nitrogen source, different materials loaded nitrogen-doped titanium dioxide were prepared by sol-gel method. The photocatalytic degradation capacity of acid fuchsin which representing dyeing wastewater was investigated. The results showed that the best N/Ti ratio of glass,aluminum and nickel mesh loaded Ani/TiO2 were 0.250,0.040 and 0.040, respectively. Nitrogen doping could improve the photocatalytic activity of titanium dioxide in the sunlight. The best pH of their photocatalytic degradation capacity were all 6 to 8,their best initial concentrations were 10 mg/L,12 mg/L and 12 mg/L, respectively, and their photocatalytic activity would all decrease with the increase of the solution depth. All of the best concentrations of ferric nitrate were 0.5×10-5 to 1.0×10-5 mol/L. Overall, the photocatalytic activity of glass loaded Ani/TiO2 was the highest, while nickel mesh loaded Ani/TiO2’s was the lowest.

关 键 词：TIO2 光催化 N掺杂 印染废水 

分 类 号：X703.1[环境科学与工程—环境工程]