摘要
以Ag纳米线为模板,通过两步水浴法合成了Ag/Zn O/Zn Se三元异质结光催化材料。利用场发射扫描电子显微镜(FESEM)、X射线能谱仪(EDS)、X射线衍射仪(XRD)以及透射电子显微镜(FETEM)对样品的形貌和结构进行了表征。结果显示,Ag/Zn O/Zn Se三元异质结为蠕虫状的Ag/Zn O二元异质结外镶嵌着Zn Se小颗粒。在可见光下,对比纯Ag纳米线、纯Zn O纳米球、Ag/Zn O异质结对罗丹明B的可见光降解效率,结果发现Ag/Zn O/Zn Se异质结表现出了更高的光催化效率。其光催化性能的提高主要是由于Ag/Zn O/Zn Se异质结的作用促使电子空穴对的分离,降低了电子空穴对的复合机率,从而提高了材料的光催化效率。
Ag/ZnO/ZnSe heterostructure nanocatalysts were successfully synthesized via twice immersion method by use of as-prepared Ag nanowire. The structure and morphology of Ag/ZnO/ZnSe heterostrueture are investigated by X-ray diffraction （XRD）, field emission scanning electron microscopy （FESEM）, energy-dispersive X-ray spectroscopy （EDS） field emission transmission electron microscopy （FETEM）. It is proved that Ag/ZnO/ ZnSe heterostructure was consisted with vermicular Ag/ZnO heterostructure coated by ZnSe nanoparticles. Compared with pure Ag nanowire, pure ZnO nanosphere and Ag/ZnO heterostrueture, the results showed that the photocatalytic activity of the Ag/ZnO/ZnSe heterostructure was higher than other samples. The enhanced photocatalytic activity could be attributed to the formation of heterostructure, which might improve the separation of photogenerated electron-hole pairs, and decrease recombination probability.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2015年第2期260-266,共7页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金(No.51002102)
山西省自然科学基金(No.2012011046-7)资助项目
