H2O2原位净化定向碳纳米管阵列的研究

采用无模板的化学气相沉积法(CVD)，在石英衬底上制备了大面积、高定向性、自支撑的定向碳纳米管阵列。对此阵列采用原位H2O2氧化，可以有效地达到净化定向碳纳米管阵列的目的。扫描电镜(SEM)检测表明净化碳纳米管的过程并不会破坏其定向性。此种方法可以获得不同厚度的、多数碳管端帽打开、非晶碳、缺陷碳管和杂质较少的定向碳纳米管阵列，此种阵列在场发射等方面具有应用价值。Raman光谱和热失重分析(TGA)表明经过净化的碳纳米管的晶化程度和热稳定性都有所提高。

In-situ purification of aligned carbon nanotube arrays by H2O2

A non-template chemical vapor deposition (CVD) method was adopted to prepare highly directional and self-standing aligned carbon nanotube (ACNT) arrays on a quartz substrate on a large-scale and H_2O_2 was used to in-situ oxidize impurities in the arrays. It is found that the in-situ purification of ACNT arrays by H_2O_2 is an efficient way to purify ACNT arrays without damaging their alignment and the ACNT arrays obtained have a different thickness. In most cases the tips were open with a smaller amount of amorphous carbon, disfigured CNTs and other impurities. Such arrays have potential applications in field emission. The results of Raman spectroscopy and TGA show that the crystallization and thermal stability of ACNT arrays increase after the purification.