TiO2纳米颗粒/纳米棒阵列复合薄膜的制备及其光电催化性能

摘要

以金属钛箔为钛源，采用双氧水和盐酸体系，通过水热法制备合成 TiO2纳米棒阵列薄膜，并通过调节双氧水和盐酸的用量，调控 TiO2纳米棒阵列薄膜的微观形貌和物相构成。结合溶剂挥发自组装法将 TiO2纳米颗粒引入纳米棒阵列中，得到复合型TiO2光催化剂。以亚甲基蓝为模拟污染物，考察TiO2复合薄膜的光催化活性。通过扫描电镜(SEM)和X射线衍射(XRD)测试对TiO2复合薄膜的物相和表面形貌等进行了表征，并采用电化学交流阻抗法(EIS)分析其表面电荷转移特性。TiO2纳米颗粒/纳米棒阵列复合薄膜在光电协同条件下，展示出高的光电催化活性。%Highly ordered TiO2 nanorod arrays were prepared using Ti plate as titanium source in HCl and H2 O2 system.The microstructure morphology and crystallinity were controlled by the modification of the molar ratio of HCl and H2 O2 .Evaporation induced self-assembly (EISA)strategy was also used to introduce TiO2 nanop-articles into nanorod arrays.The photocatalytic performance of composite catalyst was investigated by using methylene blue (MB)as simulated contamination.The structure and compositions of photocatalysts were char-acterized by scanning electron microscope (SEM)and X-ray diffraction (XRD).Effects of incorporation of TiO2 nanoparticles on the charge transfer rate of the TiO2 nanorod arrays were investigated with electrochemical im-pedance spectroscopy (EIS)analysis.The TiO2 nanoparticlesanorod arrays composite photocatalyst showed high photoelectrocatalytic activity.