分级结构WO_(3)-TiO_(2)-CNFs纳米复合材料的制备及其光催化性能研究

Preparation and Photocatalytic Performance of WO_(3)-TiO_(2)-CNFs Nanocomposites with Hierarchical Structure

本文通过水热法在多孔碳纳米纤维(CNFs)表面负载TiO_(2)和WO_(3),成功制备了高比例暴露、光催化性能优异且易于回收的WO3-TiO_(2)-CNFs三元复合材料,研究了WO3的添加量对光催化性能的影响,采用SEM、TEM、XRD、BET、和UV-vis等手段对催化剂进行了表征,并通过降解亚甲基蓝(MB)溶液来考察其光催化性能。结果显示,WO3与TiO_(2)的最佳复合摩尔百分比为4%,经过模拟太阳光照射90min后,对15 mg/L MB溶液的降解率为97.4%,且重复使用5次之后,对MB溶液的降解率仍然保持在93.6%。

By loading TiO_(2) and WO_(3) on the surface of carbon nanofibers using hydrothermal method,WO_(3)-TiO_(2)-CNFs ternary composite materials with high exposure ratio,excellent photocatalytic performance,and easy recovery were successfully prepared.The effect of WO_(3) addition on photocatalytic performance was studied.The catalyst was characterized by SEM,TEM,XRD,BET,and UV vis methods,and its photocatalytic performance was investigated by degrading methylene blue(MB)solution.The results showed that the optimal composite molar percentage of WO_(3) and TiO_(2) is 4%.After 90 minutes of simulated solar irradiation,the degradation rate of 15 mg/L MB solution was 97.4%,and after 5 repeated uses,the degradation rate of MB solution remained at 93.6%.