碳纳米管表面涂覆钛的新方法

摘要

采用TiC14水解法对表面酸功能化的碳纳米管(CNTs)进行TiO2涂层,然后通过程序升温还原(TPR),使TiO2涂层转变为Ti涂层.利用SEM、TEM、XRD和EDAX对CNTs、CNT/TiO2纳米复合材料和Ti涂层CNTs进行表征.结果表明:超声波酸功能化CNTs后,可将TiO2成功地涂覆于CNTs表面;在850℃下、H2/Ar氛围中,通过TPR可将TiO2涂层还原为金属Ti涂层.该Ti涂层对CNTs和其他金属形成复合材料非常重要.%The surfaces of acid-functionalized carbon nanotubes(CNTs)were coated by TiO2 produced by the hydrolysis of TiC14,which was converted into Ti through temperature-programmed reduction(TPR)equipment.SEM,TEM,XRD,and EDAX analyses were used to characterize the primary CNTs,as-prepared TiO2-coated CNTs and the Ti-coated CNTs.It was found that after the functionalization of CNTs by ultrasonic-assisted acid treatment,TiO2 was successfully coated onto the CNTs,which was reduced in TPR under H2/Ar flow at 850℃ to metal Ti.The Ti transition layer is important for the formation of composites of CNTs with other metals.