掺铁TiO_2光催化降解活性艳红X-3B的研究

Study on photocatalytic degradation of reactive brillian red X-3B by TiO_2 doped with Fe3+

利用溶胶-凝胶法制备了掺铁 改性的TiO_2粒子 ,以活性艳 红X-3B为模型化合物 ,考察了掺铁量和焙烧温度对TiO_2光催化性能的影响。进一步研究表明 ,适量的铁离子掺杂可明显提高TiO_2的活性,本 试验中最佳量为0.1%,掺铁TiO_2光催化降解X-3B反应的动力学符合Langm uir-H inshelhood模型 ,改性使TiO_2对太阳光的利用效率有 了极大的提高。

TiO_2 Particles doped with Fe3+ were prepared by the sol-gel method. The Photocatalytic activity of TiO_2 was evaluated by the photo-degradation of Active Brilliant Red X-3B. The influences of calcined temperature and the content of doped Fe3+ were investigated. Study showed that appropriate amount of doping could markedly improve the photocatalytic activity of TiO_2, and it is 0.1% in our experiment. The kinetics of X-3B photo-degradation were in accordance with Langmuir-Hinshelhood model withing given concentrations. Doping can also obviously improve the sunlight utilization rate of TiO_2.