Yb离子掺杂纳米ZnO的合成及其光催化性能研究

摘要

直接沉淀法制备纳米ZnO后利用浸渍法制备其Yb3＋掺杂产物,以XRD、FESEM、HRTEM、XPS、漫反射吸收光谱和分光光度法等研究了粉体的特征及光催化性能。结果表明500℃煅烧获得的纳米ZnO具有六方纤锌矿结构,粒径分布范围较窄;适量的Yb3＋掺杂能有效地提高纳米ZnO对罗丹明B的光催化降解效率。%ZnO nanopowders were prepared through a direct precipitation method,and then dipped into Yb（NO3）3 aqueous solution to obtain the Yb3＋-doped ZnO nanoparticles.The obtained ZnO nanopowders and its Yb3＋-doped products were characterized by XRD,FESEM,HRTEM,XPS,diffuse reflection absorption spectrum and spectrophotometry.The experimental results show that the obtained ZnO nanoparticles after calcinations at 500℃ are hexagonal crystal phase with narrower particle size distribution.Moreover,the samples were employed for the photodegradation of Rhodamine B in an aqueous suspension,and it was found that suitable Yb3＋-doping levels can efficiently improve the photocatalytic activity of the obtained ZnO nanoparticles.