PbS纳米晶包裹碳纳米管的原位合成

In Situ Coating Carbon Nanotubes with PbS Nanocrystals

介绍了一种PbS纳米晶原位包裹碳纳米管的方法.其主要过程包括酸化处理碳纳米管、通过硫源与碳纳米管的酸碱反应原位引入硫源及水热处理.用XRD、TEM、EDS、FTIR等表征手段对材料进行结构表征,研究表明,PbS均匀、致密、连续地覆盖在碳纳米管表面,但是辨别不出单个的晶粒.通过FTIR的研究给出了这种方法原位组装PbS的机理.

A facile and effective method of in situ coating multi-walled carbon nanotubes （MWNTs） with PbS nanocrystals was introduced, which includes acid treatment of MWNTs, in situ introduction of sulfur precursor through the acid-base reaction between 2-mercatoethylamine and the -COOH groups on the surface of MWNTs and hydrothermal treatment in the following procedure. The samples were characterized by TEM, XRD and FTIR. TEM images showed that carbon nanotubes were nearly fully coated with a layer of PbS, and the coating layer was 10-20nm in thickness. A tentative mechanism was proposed to explain the results.