高温热解法合成硫化亚铜纳米晶

Synthesis of Cuprous Sulfide Nanocrystalline by High Temperature Pyrolysis

以氯化铜和十二烷基硫醇为原料,聚乙二醇为表面活性剂,采用高温热解法在200℃反应30min,成功制备了硫化亚铜纳米碟晶体。利用X射线粉末衍射仪(XRD)、紫外可见吸收光谱(UV-3600)、透射电子显微镜(TEM)以及高分辨透射电子显微镜(HRTEM)、元素分析(EDS)等对产品进行表征。结果表明,所制备的硫化亚铜纳米晶体为六方晶相结构,吸收光谱显示吸收峰在1880nm左右,并且为宽带吸收,透射电镜表明硫化亚铜纳米碟晶体的直径约为80nm。光催化试验表明,在紫外和可见区该硫化铜纳米晶具有较高的光催化活性。经35W氙灯和450 W高压汞灯光照射30min,亚甲基蓝的降解率分别达到98.2%和81.6%。

Disklike cuprous sulfide nanocrystallines were successfully prepared by high temperature pyrolysis method at 200℃ for 30 min applying copper chloride and laurylmercaptan as raw materials,and polyethylene glycol as surfactant.The products were characterized by XRD,UV-visible absorption spectroscopy(UV-3600),TEM,HRTEM,and EDS.The results show that prepared cuprous sulfide nanocrystallines have a hexagonal phase structure,and absorption spectrum shows an absorption peak at about 1880 nm,which is a broadband absorption.TEM shows that diameter of cuprous sulfide crystal is about 80 nm.The photocatalytic experiments show that copper sulfide nanocrystallines have high photocatalytic activity in ultraviolet and visible regions.Degradation rate of methylene blue is 98.2%and 81.6%respectively after irradiated by 35 W xenon lamp and 450 W high-pressure mercury lamp for 30 min.