多孔纳米Fe~(3+)/TiO_2的制备及其光催化性能

以十六烷基三甲基溴化胺为表面活性剂,采用改性溶胶凝胶法制备了多孔纳米Fe3+/TiO2复合材料,以TEM、XRD、DTA等对其进行了表征。对10 mg/L甲基橙溶液进行太阳光催化降解,考察了光催化效果的影响因素。结果表明,复合材料有多孔结构,表面活性剂的加入和Fe3+掺杂能抑制粒径的长大,w(十六烷基三甲基溴化胺)=5%,w(Fe3+)=2%,甲基橙水溶液的pH=5时,复合材料的光催化效果最好,太阳光照射3 h,甲基橙降解率达到30%以上,使TiO2的光催化效率提高了10倍。

Preparation of Porous Nanometer Fe3+/TiO2 Composite Material and Its Photocatalytic Activity

Porous nanometer Fe~(3 )/TiO_2 composite material was prepared using CTAB as surfactant by modified sol-gel method.The composite material was characterized by TEM,XRD and DTA.Photocatalytic degradation experiments for 10 mg/L methyl orange solution were performed to inspect the factors influencing the photocatalytic activity.Experimental results show that the composite material has porous structure,and the addition of surfactant CTAB and Fe~(3 ) can resist the growth of crystal size.Photocatalytic activity of the composite material is the best when the mass percentage of CTAB is 5%,the doping content of Fe~(3 ) is 2%,and pH of the methyl orange solution is 5.The degradation rate is more than 30% under sunshine for 3 h so that the photocatalytic efficiency of TiO_2 is enhanced 10 times.