结合静电纺丝和高温碳化方法制备了La~(3+)及碳纳米管(CNTs)不同掺杂量的TiO_2光催化剂,然后采用亚甲基蓝水溶液模拟印染废水,考察各种光催化剂的降解性能。同时,采用SEM、XRD、EDX、FTIR及UV-Vis对光催化剂的形貌、晶型、成分、内部结构以及光催化性能进行了表征和测试。试验结果显示,La~(3+)及CNTs共掺杂的TiO_2光催化剂的光催化活性得到显著提高。 The photocatalysts doped La 3+ and carbon nanotubes (CNTs) with different doping amount were prepared by electrospinning and high temperature carbonization. Then the methylene blue solution was used to simulate the dyeing wastewater and the degradation performance of various photocatalysts was investigated. Meanwhile, the morphology, crystal form, composition, internal structure and photocatalytic activity of the photocatalysts were characterized and tested by SEM, XRD, EDX, FTIR and UV-Vis. The experimental results show that the photocatalytic activity of La 3+ and CNTs co-doped TiO 2 photocatalyst has been significantly improved.