负载型二氧化钛催化剂的制备及催化降解苯酚的研究

Photocatalytic Degradation of Phonel by I-TiO_2 Supported on Activated Carbon

以钛酸四丁酯为前驱体、碘酸钾为碘源,粒状活性炭为载体,采用水热法和浸渍烧结法合成了I-TiO2/AC负载型催化剂.采用XRD、XPS、EDS等手段对催化剂进行表征.以苯酚为目标物,研究了不同种催化剂对苯酚的吸附效率及不同经浸渍-烧结处理的次数的I-TiO2/AC催化剂在可见光下降解苯酚的效率.实验结果表明:采用浸渍结烧法I-TiO2成功负载在活性炭上.由于活性炭和I-TiO2催化剂的协同作用,I-TiO2/AC催化剂对50 mg/L苯酚的吸附效率高达95.8%,在模拟太阳光下对苯酚的降解效率高达64%.

I-doped TiO2 photocatalysts were fabricated by hydrothermal method, using tetrabutyl titanate as precursor, po- tassium iodate as doping sources and then I-doped TiO2 photocatalysts were immobilized to granular activated carbon with the mesh number of 20 to 40 （ 0. 9 mm- 0. 45 mm ） by soaks-sintering process. The catalysts were characterized by XRD, XPS, EDS. The adsorption efficiency of phenol and the degradation efficiency under simulated sunlight by I - TiO2/AC of different loading times were investigated. The results showed that I-doped TiO2was successfully immobilized to granular activated carbon,the adsorption efficiency of phenol by I - TiOJAC reached 95.8% and degradation effi- ciency of phenol under simulated sunlight by I - TiO2/AC came to 64%.