铜基MOF二维材料的制备及其光电流性能

Preparation and photocurrent properties of two-dimensional copper-based MOF materials

以1,3,5-苯三甲酸和三水硝酸铜为前驱体,通过室温搅拌法成功制备了三维立方体形貌的铜基金属有机框架(metal-organic framework,MOF)材料.进一步地,利用葡萄糖和氨水共同调节反应体系,使三维材料的结构松散并提供稳定环境,得到二维纳米片状材料.对制备的2种材料进行扫描电镜、透射电镜和X射线粉末衍射等表征,并在可见光下进行光电流响应能力和电化学阻抗测试.结果表明,相较于三维铜基MOF材料,二维纳米片状材料因其电阻小而更利于电子的快速转移,故具有更高的光电流性能.

Copper-based metal-organic framework(MOF)Cus(BTC)2 with morphology of threedimensional cubic is successfully prepared by using 1,3,5-benzenetricarboxylic acid and copper nitrate hydrate as precursors via a stirring method at room temperature.Moreover,by using glucose and ammonia water to regulate the reaction system,the structure of the three-dimensional material is loosened and a stable environment is provided,and two-dimensional nanosheet materials are obtained.A series of characterizations for both two materials are performed,such as SEM,TEM,PXRD and so on.The results of photocurrent test under visible light indicate that the two-dimensional nanosheet materials have high photocurrent response ability.Compared with the three-dimensional copper MOF materials,two-dimensional nanosheet materials are more conducive to rapid electron transfer because of their small resistance,so they have higher photocurrent performance.