WO3/TiO2/{001}的合成和光催化性能研究

Preparation of WO3/TiO2/{001} and study on photocatalytic performance

利用浸渍焙烧法,将暴露{001}晶面的TiO2与WO3成功进行了复合改性。利用XRD、FT-IR、SEM、UV-Vis、等表征手段对复合材料进行表征,结果表明复合材料不影响暴露的{001}晶面比例,且复合材料WO3/TiO2/{001}对紫外光和可见光的吸收均有所增强的吸收边均有明显红移。以罗丹明B为目标污染物,可见光下的光催化降解实验结果表明:WO3的最佳复合量为0.5%,降解效率可达97.5%,均优于TiO2/{001}的87.5%。

TiO2 with exposed {001} facets was successfully composited with WO3 by an impregnation and calcination method. The as-prepared composites were characterized by various types of techniques including Xraydiffraction(XRD),Fourier transform infrared spectra(FTIR), scanningelectron microscopy(SEM), UV-Vis diffuse reflectionspectroscopy(UV-Vis). The results showed that composite materials didn’t experience the loss of the percentage of exposed {001} facets. Absorption strength of composite material in the ultraviolet and visible light region increased and the absorption edge of WO3/TiO2/{001} composites was red shifted obviously. The photocatalytic activity of composite materials was evaluated and the result showed that the efficiency of degradation of the composite WO3/TiO2/{001}could reach 97.5%, which is higher than 87.5% of pure {001}TiO2.The best optimized loaded contentof WO3 is 0.5 wt%.