【摘要】 采用浸渍-提拉法在玻璃纤维(GF)表面负载纳米TiO2,制备TiO2/GF复合光催化剂。通过X射线衍射(XRD)、热重-差热分析(TG-DSC)、扫描电镜(SEM)及能谱元素分析(EDS)对TiO2/GF复合光催化剂的结构进行了表征。结果表明,经550℃以下热处理,TiO2的晶型为锐钛矿相,随着热处理温度的升高,TiO2的晶型逐渐转化为金红石相。以亚甲基蓝的光催化降解为探针反应,评价TiO2/GF复合材料的光催化活性。复合材料的光催化降解活性与P25相当,且经多次使用后,复合光催化剂对亚甲基蓝的降解率仍保持在80%以上。更多还原

【Abstract】 TiO2 /GF composites were prepared by loading titania on the glass fiber with dipping method.The sample was characterized by X-ray diffraction(XRD),thermogravimetric-differential scanning calorimeter(TG-DSC),scanning electron microscope(SEM) and energy dispersive spectrometer(EDS) analysis technologies.The results show that when the calcination temperature below 550 ℃,the titania dioxide crystalline phase were anatase.The titania dioxide gradually transformed into rutile crystal phase with the increasing of the calcination temperatures.The photocatalytic activitie of TiO2 /GF composites were evaluated by the photocatalytic decomposition of methylene blue.The composites showed higher photocatalytic activities as P25 commercial pure titania dioxide nanoparticles.The decomposition of methylene blue was more than 80% after repeated use.更多还原