载银光催化剂Ag-TiO_2合成及光催化性能

The Synthesis and Photocatalytic Activity of Ag-Loaded Photocatalyst Ag-TiO_2

通过光化学沉积法合成了负载有贵金属银的高活性光催化剂Ag -TiO2 ,通过以亚甲基蓝为模型化合物对所制得的光催化剂的光催化活性进行评价 ,研究了制备过程中的主要因素对催化剂活性的影响。结果表明 ,当AgNO3的含量为 0 .1mol/L时 ,AgNO3 溶液用量为 7mL/gTiO2 ,AgNO3 与Na2 NO3 的溶液体积比为 2∶1,所合成的Ag -TiO2 光催化剂活性最高。在相同条件下 ,Ag -TiO2 对亚甲基蓝的降解速率是原料TiO2 的 8倍。

Ag-TiO 2(Ag-loaded Titanium dioxide) was prepared by photochemical precipitation, some affecting factors during the preparation were discussed in this paper. Methylene blue was used as model compound to determine the photocatalytic activity of the photocatalyst. The optimal condition for Ag-TiO 2 was determined∶ the dosage of AgNO 3 aqueous solution (0.1 mol/L) is 7 mL/g, the ratio of AgNO 3 solution volume to Na 2CO 3 2∶1. Under the same condition, degradation rate of Ag-TiO 2 is near 8 times to that of naked TiO 2.