以钛酸丁酯和硝酸镧为原料,采用溶胶-凝胶法制备了纯的和La掺杂活性炭负载TiO2催化剂,用XRD、UV-V is漫反射光谱和扫描电镜等测试技术对该催化剂的晶型和形貌进行了表征,并考察了La含量和焙烧温度对TiO2/AC催化剂的性质及光催化分解亚甲基蓝活性的影响。结果表明,La掺杂不仅抑制了TiO2由锐钛矿相向金红石相的转变,而且使TiO2的光响应范围向可见光区拓展。当掺杂摩尔分数为0.30%的La,可见光照射120 m in时,La-TiO2/AC催化剂的光催化分解率可达87%。
Iodine doped nanocrystalline TiO2 photocatalyst was prepared by sol-gel method. The results show that crystallinity of anatase was improved upon iodine doping, and iodine not only suppressed phase transition anatase to rutile, but also exhibited an absorption in the wave length range of 400～550 nm. The photocatalytic activity of I-doped TiO2 photocatalysts（500 ℃） exceeded that of pure TiO2 photocatalyst prepared by the same method when the molar ratio of HIO3 to Ti was kept in the range of 0.05～0.20.
