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采用水热法合成了一系列不同Ag2CO3含量的新型Ag2CO3/ZnO异质结复合光催化剂,运用X射线粉末衍射(XRD)、扫描电镜(SEM)、X射线光电子能谱(XPS)、傅里叶变换红外光谱(FT-IR)、紫外-可见漫反射吸收光谱(UV-vis DRS)等系列手段对所制备的光催化剂进行了表征,并以紫外光(254 nm)为光源,评价了催化剂光催化降解甲基橙的活性,考察了不同Ag2CO3复合量、不同水热温度对ZnO复合光催化剂反应活性的影响.结果表明,当Ag2CO3含量为2%、水热温度为140℃,复合光催化剂具有最大的光催化活性,降解率达到86.31%.Ag2CO3/ZnO异质结复合光催化剂具有更高的光催化活性主要原因是复合光催化剂对紫外光有很强的吸收能力,适量Ag2CO3能提高光生电子-空穴对的分离效率,并改善催化剂的物理性能.
A series of Ag2CO3 / ZnO heterojunction composite photocatalysts with different Ag2CO3 contents were synthesized by hydrothermal method. The effects of XRD, SEM, XPS, The prepared photocatalysts were characterized by FT-IR and UV-vis DRS. UV light (254 nm) was used as a light source to evaluate the photocatalytic activity of the catalyst Catalyzed degradation of methyl orange, the effect of different amount of Ag2CO3 and hydrothermal temperature on the photocatalytic activity of ZnO composite photocatalyst was investigated. The results showed that when Ag2CO3 content is 2% and hydrothermal temperature is 140 ℃, the composite photocatalyst has The maximum photocatalytic activity, the degradation rate of 86.31% .Ag2CO3 / ZnO heterojunction composite photocatalyst has a higher photocatalytic activity is mainly due to the composite photocatalyst has a strong UV absorption capacity, the amount of Ag2CO3 can improve photogenerated electron - the separation efficiency of hole pairs, and improve the physical properties of the catalyst.