铁掺杂氧化锌制备及对有机染料的光催化降解

Preparation of Fe doped ZnO and photocatalytic activity for organic dyes degradation thereof

采用沉淀法制备铁掺杂的纳米氧化锌。通过粉末X射线衍射(PXRD)和红外光谱(IR)对样品及其前驱体进行表征;采用分光光度计测定样品光催化降解有机染料的效果;用扫描电子显微镜(SEM)观测样品的表面形貌。实验结果表明,铁掺杂的氧化锌比纯氧化锌具有更高的催化活性和催化效率。这归因于铁均匀分布在氧化锌中,避免了氧化锌纳米粒子间的团聚,改善了氧化锌表面的性质,在降解有机染料过程中与有机染料大面积接触,对甲基橙和亚甲基蓝具有良好的降解效果,是一种有潜力的光催化降解材料。

Fe doped ZnO nano-powders were prepared by precipitation method.The Fe/ZnO sample and its precursor were characterized by powder X-ray diffraction （PXRD） and infrared absorption spectroscopy （IR）.The effect of photocatalytie degradation of organic dyes were determined by spectrophotometer, and the surface morphology of the samples were observed by scanning electron microscope （SEM）.Experimental results showed that Fc doped ZnO catalysts had the higher degradation rates for the methyl orange （MO） and methylene blue （MB） than that of pure ZnO, which was attributed to effects of the iron introduction.Fe-doping into ZnO could change the surface character of primary nanoparticles, and inhibited the particle agglomeration,so as to contact with organic dyes extensively during the degradation.These characteristics make the Fe doped ZnO to be promising candidate for the photocatalytic degradation of organic dyes.