| Abstract: | A series of mesoporous nano-TiO2 material doped with Sn are synthesized by a homogenous precipitation method aided by microwave heating, using TiCl4 and SnClm4 as raw materials, urea as precipitator, active carbon as templet, and soluble starch as anti- agglomerating reagent. XRD results show that the precursor exists in the amorphous phase, and transforms to anatase structure above 400°C. TEM results show that the particle is in spherical shape and the average diameter is 20 nm. EDS results show that the measuring value of compound is in accord with the actual value of the raw materials, and the doping uniformity is good. The photo-catalytic experimental results show that the highest photo-catalytic efficiency can be obtained when the content of Sn is 10% (mol pecent), and the decolorization rate of navy blue dye can be as high as 100% after being illuminated by sunlight for 70 min. The photo-catalytic reaction is a first-order kinetic reaction. |
