摘要
为了提高TiO2的光催化性能,采用掺杂Fe3+的方法对SO42-/TiO2固体超强酸(FST)进行了改性,采用IR、XRD等方法对FST的结构进行了表征,研究了FST光催化亚甲基蓝降解的性能。结果表明,适宜的制备条件为:掺杂Fe3+量为0.4%,焙烧温度为500℃,硫酸浓度为0.5mol.L-1,硫酸体积为15mL.g-1,亚甲基蓝降解率可达95%。通过浸渍焙烧处理,FST具有良好的重复使用性能。红外分析表明,在FST中形成了超强酸活性中心,XRD分析表明,在FST中TiO2的晶型为锐钛矿型,Fe3+进入到TiO2晶格中,未影响到TiO2的晶型。
In order to improve the photocatalytic property of TiO2,the Fe^3＋ modified super solidacid SO4^2-/TiO2（FST）was prepared by doping Fe^2＋ into TiO2,FST were characterized by IR,XRD techniques. The degradation of methylene blue with FST as photocatalysts were studied. The results showed that the suitable prepare condition was：the amount of doped Fe^3＋ was 0.4% ,the baking temperature was 500℃,the concentration of sulfuric acid was 0.5mol·L^-1,the volume of sulfuric acid was 15mL·g^-1, the degradation can reach 95%,the reuse performance of FST was good after soaking and baking. IR showed that the super acid center was made in FST,XRD showed that TiO2 in FST was anatas. Fe^3＋ was doped into TiO2 crystalline without changing the phase of TiO2.
出处
《安徽化工》
CAS
2008年第5期15-18,共4页
Anhui Chemical Industry
基金
安徽省教育厅自然科学基金资助项目(2003kj051)
