双元素共掺杂纳米TiO_2的制备及光催化活性

Preparation of nanometer TiO_2 doped with double element and its photo-catalytic activity

采用特殊液相沉淀法制备了双元素镧和铁掺杂纳米二氧化钛粉体,通过TG-DTA对其前驱体进行分析,用XRD和TEM对其进行表征。用它做催化剂在日光作用下对亚甲基蓝进行了光催化实验,结果表明双元素镧和铁掺杂纳米二氧化钛比纯纳米TiO2粉体光催化效果好。其中掺铁1%、镧0.5%的纳米TiO2在焙烧温度650℃焙烧时间30 min时效果最佳。

Adoping nanometer titanium dioxide is prepared in liquid-phase precipitation method, and it was analyzed with TG-DTA,it was characterized with XRD and TEM. The catalysis-degeneration experiments were carried, in which the adoping titanium dioxide was used as the catalysis. The results indicate that the nanometer titanium dioxide, which is mixed with double elements iron and lanthanum, is better than the pure titanium dioxide in photochemical catalysis activeness, the product of nanometer titanium dioxide, which is mixed with 1% of iron and 0.5 % of lanthanum and masted 30 min at 650℃, is best in catalysis effect.