ZnSe微球的制备与性能研究

Preparation and Properties of ZnSe Microspheres

采用水热法,以ZnSO4.7H2O为Zn源,Na2SeO3为Se源,NaOH溶液为反应介质,N2H4.H2O为还原性助剂,在140℃下反应24h,合成了直径为1～4μm、分散性较好的ZnSe微球。SEM、XRD和UV-Vis测试发现,NaOH和N2H4.H2O共同控制着ZnSe的形貌,制备的ZnSe微球是由平均尺寸为20.7nm的ZnSe纳米晶在N2微泡上聚集而成的中空球。

Well dispersed ZnSe microspheres with diameter of 1-4 μm have been prepared in NaOH aqueous solution as reaction medium,N2H4·H2O as reductive assistant at 140 ℃ for 24 h by hydrothermal synthesis using ZnSO4·7H2O and Na2SeO3 as source materials.Through SEM,XRD and UV-vis analysis,it was found that the shape of ZnSe crystal was controlled by NaOH and N2H4·H2O and the products of ZnSe microspheres were hollow microspheres which came from the aggregation of ZnSe nanocrystals with mean diameter of 20.7 nm on the surface of N2 microbubble.