喷雾高温分解法制备TiO2/WO3多孔微球的光催化活性

摘要

为了增强TiO2中电子和空穴的分离效率,通过喷雾高温分解的方法制备了TiO2多孔微球、TiO2/WO3多孔微球.多孔微球样品通过SEM和XRD进行表征.TiO2/WO3多孔微球与TiO2多孔微球进行比较显示出较低的发光强度,这说明WO3的引入能够增强TiO2电子和空穴的分离效率.在太阳光的照射下,TiO2/WO3多孔微球无论是对乙醛的降解速率影响还是生成CO2的速率都显示出最高的光催化活性,这可能是由于电子、空穴复合的抑制所导致的.通过此方法合成的TiO2/WO3多孔微球在能量、环境保护、生物及其他重要领域将有重大的应用潜力.%In order to enhance charge separation of TiO2,TiO2 and TiO2/WO3 porous microspheres were prepared by ultrasonic spray pyrolysis. The microspheres were characterized with SEM,XRD. The PL intensities of TiO2/WO3 porous microspheres are lower than that of TiO2 porous microspheres,which suggests the introducing of WO3 enhances charge separation of TiO2. Under solar irradiation,TiO2/WO3 porous microspheres showed higher photocatalytic activity for acetaldehyde degradation and CO2 generation compared with TiO2,which could be ascribed to the suppression of electron-hole pair recombination. Also,it is believed that the novel porous TiO2/WO3 porous microspheres by this synthesis route might offer a great potential in energy,environmental protection,bioengineering,and many other impor-tant areas.