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通过沉淀法成功制备了Ag2CO3/WO3复合光催化剂。用X-射线衍射、扫描电镜和紫外可见漫反射光谱对所制备的样品进行了表征。通过在可见光(λ>420nm)下降解水中的甲基橙来检测样品的光催化活性。结果表明:Ag2CO3/WO3的光催化活性和稳定性都高于纯相Ag2CO3,其原因是Ag2CO3导带上的光生电子易于向WO3上转移,提高了光生载流子的分离效率,也使得光生电子不再将Ag2CO3中的Ag+还原为Ag。
The Ag2CO3 / WO3 composite photocatalyst was successfully prepared by precipitation method. The prepared samples were characterized by X-ray diffraction, scanning electron microscopy and UV-vis diffuse reflectance spectroscopy. The photocatalytic activity of the sample was tested by degrade methyl orange in water at visible light (λ> 420 nm). The results show that the photocatalytic activity and stability of Ag2CO3 / WO3 are higher than that of pure Ag2CO3. The reason for this is that the photogenerated electrons on the Ag2CO3 conduction band tend to transfer to WO3 and improve the separation efficiency of photogenerated carriers, Ag2 + in Ag2CO3 is no longer reduced to Ag.