花状TiO_2的制备及光催化性能研究

Synthesis and Photocatalytic Properties of Flower-like TiO_2

采用溶剂热法合成了花状TiO2,运用SEM、XRD和N2物理吸附-脱附等对其形貌、结构、比表面积和孔径进行了表征,并以甲基橙为模拟污染物研究了它们的光催化性能。结果表明,花状TiO2结构为锐钛矿相,是由纳米晶定向聚集形成纳米棒组成的3D花状结构,花状结构的直径在0.7-1.5μm,平均直径在1.1μm,细小纳米晶聚集形成的纳米棒的直径在20-25 nm,长度100-150 nm。该样品具有较高的比表面积,表现出良好的光催化活性。

Flower-like Ti0 2were synthesized by solvothermal method. The crystal structure, morphology, composition and specific surface area of the products were characterized by SEM, XRD and N2 adsorption-desorption. The photocatalytic activity was evaluated by degradation of methyl orange （ MO）.The results show that flower-like TiO is nanometer anatase, the formation of nanorods is composed of nano crystalline orientation and aggregation, which has the structure of 3D flower like structure. The diameter of the flower-like Ti02 nanostructure was 0. 7-1. 5 jjim and the average diameter was 1. 1 jjim. The diameter and length of nanorods formed by small and nano crystalline aggregates are 20-25 nm and 100- 150 nm, separately. The products have a high specific surface area, exhibits excellent photocatalytic activity.