棒状TiO_(2)的制备及其光催化性能

Preparation and Photocatalytic Performance of Rod-like TiO_(2)

以硫酸氧钛(TiOSO_(4))为前驱体、CaH_(2)为还原剂,通过简单的水热法制备棒状和自掺杂改性黑色棒状TiO_(2)光催化剂,利用SEM、XRD、UV-vis/DRS等表征方式对其微观形貌和结构进行测试。以四环素为目标污染物,对其光催化性能进行评价。结果表明,改性材料具有分散性好、形状规则的棒状形貌。另外,棒状TiO_(2)光催化剂表现出较高的光催化活性,以可见光作为光源,反应120min,四环素的降解率达到90.3%;经过5次重复使用,降解率依然达到80.9%。

Rod-like and self-doped rod-like modified TiO_(2) photocatalyst was prepared by a simple hydrothermal method using TiOSO_(4) as the precursor and CaH_(2) as the reducing agent.The microstructure and morphology were characterized by SEM,XRD and UV-vis/DRS.The photocatalytic performance of tetracycline was evaluated.The results showed that the modified material had rod-like morphology with good dispersibility and regular shape.In addition,the rod-like TiO_(2) photocatalyst showed high photocatalytic activity.The degradation rate of tetracycline reached 90.3%under visible light irradiation for 120 min.After five times of repeated use,the degradation rate still reached 80.9%.