离子液体中不同形貌ZnO的制备及光催化性能

Synthesis and photocatalgtic performance of ZnO with different morphogies in ionic liquids

采用水热反应的方法,以1-丁基-3-甲基咪唑溴盐([BMIM]Br)离子液体为反应介质,在140℃的温度下合成了不同形貌的ZnO粉体光催化剂。通过扫描电镜(SEM)、X射线衍射(XRD)及傅里叶转换红外光谱(FT-IR)等分析方法对产物的结构进行了表征。结果表明,所合成的不同形貌的ZnO粉体均属于六方晶相,同时具有纤锌矿结构,且离子液体对产物产生了一定的修饰作用。在以紫外灯为光源的条件下,将有机染料甲基橙为目标降解物,使用自制光催化反应器进行了光降解实验,考察了所制备出的不同形貌ZnO粉体的光催化活性。

The ZnO crystals with different morphologies were synthesized 140 ℃ using ionic liquid solvent of the 1-butyl-3-methylimidazolium bromide(Br)as reaction medium via hydrother method.The characterization by SEM,XRD and FT-IR indicated that ZnO with different structure show the hexagonal phase with wurtzite structure,and the ionic liquid show modification on the samples.the photocatalytic degradation activity of the preparaed ZnO crystals were evaluated in homemade photocatalytic reactor by taking methyl orange as degradation product.