碳纳米管表面涂覆钛的新方法(英文)

A method for coating carbon nanotubes with titanium

采用TiCl4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-ftmctionalized carbon nanotubes （CNTs） were coated by TiO2 produced by the hydroly- sis of TiCI4, 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-coa- ted CNTs. It was found that after the functionalization of CNTs by ultrasonic-assisted acid treatment, TiO2 was success- fully coated onto the CNTs, which was reduced in TPR under HJAr flow at 850 ~C to metal Ti. The Ti transition layer is important for the formation of composites of CNTs with other metals.